Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 50 of 62 results
  • Experimental neutron capture data of 58Ni from the CERN n_TOF facility

     ¿ugec, Petar; Barbagallo, Massimo; Colonna, Nicola; Bosnar, Damir; Altstadt, Sebastian; Andrzejewski, Józef; Audouin, Ludmila; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert
    Physical review C
    Date of publication: 2014-01-09
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The 58Ni(n,gamma) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of kT = 5¿100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present work at 30 keV is 34.2 ± 0.6stat ± 1.8sys mb, in agreement with latest results and evaluations, but 12% lower relative to the recent KADoNIS compilation of astrophysical cross sections.When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of 58Ni, with a negligible propagation on heavier isotopes. The reason is that, using both the old or the new MACS, 58Ni is efficiently depleted by neutron captures

    The 58Ni(n,γ ) cross section has been measured at the neutron time of flight facility n_TOF at CERN, in the energy range from 27 meV up to 400 keV. In total, 51 resonances have been analyzed up to 122 keV. Maxwellian averaged cross sections (MACS) have been calculated for stellar temperatures of kT = 5–100 keV with uncertainties of less than 6%, showing fair agreement with recent experimental and evaluated data up to kT = 50 keV. The MACS extracted in the present work at 30 keV is 34.2 ± 0.6stat ± 1.8sys mb, in agreement with latest results and evaluations, but 12% lower relative to the recent KADoNIS compilation of astrophysical cross sections.When included in models of the s-process nucleosynthesis in massive stars, this change results in a 60% increase of the abundance of 58Ni, with a negligible propagation on heavier isotopes. The reason is that, using both the old or the new MACS, 58Ni is efficiently depleted by neutron captures.

  • Ni-62(n,gamma) and Ni-63(n,gamma) cross sections measured at the n_TOF facility at CERN

     Lederer, Claudia; Massimi, Cristian; Berthoumieux, Eric; Colonna, Nicola; Dressler, Rugard; Guerrero, Carlos; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert; [et, al]
    Physical review C
    Date of publication: 2014-02-28
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The cross section of the Ni-62(n,gamma) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200 keV neutron energy and Maxwellian averaged cross sections (MACS) from kT = 5-100 keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at kT = 30 keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the Ni-63(n,gamma) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on s-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.

    The cross section of the Ni-62(n,gamma) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200 keV neutron energy and Maxwellian averaged cross sections (MACS) from kT = 5-100 keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at kT = 30 keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the Ni-63(n,gamma) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on s-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.

  • 62Ni(n,gamma) and 63Ni(n,gamma) cross sections measured at the n_TOF facility at CERN

     Lederer, Claudia; Massimi, Cristian; Berthoumieux, Eric; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert
    Physical review C
    Date of publication: 2014-02-28
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The cross section of the Ni62(n,gamma) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200 keV neutron energy and Maxwellian averaged cross sections (MACS) from kT= 5¿100 keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at kT=30 keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the Ni63(n,¿) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on s-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.

    The cross section of the Ni62(n,gamma) reaction was measured with the time-of-flight technique at the neutron time-of-flight facility n_TOF at CERN. Capture kernels of 42 resonances were analyzed up to 200 keV neutron energy and Maxwellian averaged cross sections (MACS) from kT= 5–100 keV were calculated. With a total uncertainty of 4.5%, the stellar cross section is in excellent agreement with the the KADoNiS compilation at kT=30 keV, while being systematically lower up to a factor of 1.6 at higher stellar temperatures. The cross section of the Ni63(n,¿) reaction was measured for the first time at n_TOF. We determined unresolved cross sections from 10 to 270 keV with a systematic uncertainty of 17%. These results provide fundamental constraints on s-process production of heavier species, especially the production of Cu in massive stars, which serve as the dominant source of Cu in the solar system.

  • Measurement and analysis of the Am 241 (n, gamma) cross section with liquid scintillator detectors using time-of-flight spectroscopy at the n-TOF facility at CERN

     Fraval, Kevin; Gunsing, Frank; Altstadt, Sebastian; Andrzejewski, Józef; Audouin, Ludmila; Barbagallo, Massimo; Bécares, Vicente; Belloni, Fabio; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Hernandez Prieto, Alvaro; Riego Pérez, Albert
    Physical review C
    Date of publication: 2014-04-23
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The Am241(n,¿) cross section has been measured at the n-TOF facility at CERN using deuterated benzene liquid scintillators, commonly known as C6D6 detectors, and time-of-flight spectrometry. The results in the resolved resonance range bring new constraints to evaluations below 150 eV, and the energy upper limit was extended from 150 to 320 eV with a total of 172 new resonances not present in current evaluations. The thermal capture cross section was found to be sth=678±68 b, which is in good agreement with evaluations and most previous measurements. The capture cross section in the unresolved resonance region was extracted in the remaining energy range up to 150 keV, and found to be larger than current evaluations and previous measurements. © 2014 American Physical Society.

    The Am241(n,¿) cross section has been measured at the n-TOF facility at CERN using deuterated benzene liquid scintillators, commonly known as C6D6 detectors, and time-of-flight spectrometry. The results in the resolved resonance range bring new constraints to evaluations below 150 eV, and the energy upper limit was extended from 150 to 320 eV with a total of 172 new resonances not present in current evaluations. The thermal capture cross section was found to be sth=678±68 b, which is in good agreement with evaluations and most previous measurements. The capture cross section in the unresolved resonance region was extracted in the remaining energy range up to 150 keV, and found to be larger than current evaluations and previous measurements. © 2014 American Physical Society.

  • GEANT4 simulation of the neutron background of the C6D6 set-up for capture studies at n_TOF

     ¿ugec, Petar; Colonna, Nicola; Bosnar, Damir; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert
    Nuclear instruments and methods in physics research. Section A, accelerators SP
    Date of publication: 2014-05-20
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The neutron sensitivity of the C6D6 detector setup used at n_TOF facility for capture measurements has been studied by means of detailed GEANT4 simulations. A realistic software replica of the entire n_TOF experimental hall, including the neutron beam line, sample, detector supports and the walls of the experimental area has been implemented in the simulations. The simulations have been analyzed in the same manner as experimental data, in particular by applying the Pulse Height Weighting Technique. The simulations have been validated against a measurement of the neutron background performed with a nat-C sample, showing an excellent agreement above 1 keV. At lower energies, an additional component in the measured nat-C yield has been discovered, which prevents the use of nat-C data for neutron background estimates at neutron energies below a few hundred eV. The origin and time structure of the neutron background have been derived from the simulations. Examples of the neutron background for two different samples are demonstrating the important role of accurate simulations of the neutron background in capture cross-section measurements

    The neutron sensitivity of the C6D6 detector setup used at n_TOF facility for capture measurements has been studied by means of detailed GEANT4 simulations. A realistic software replica of the entire n_TOF experimental hall, including the neutron beam line, sample, detector supports and the walls of the experimental area has been implemented in the simulations. The simulations have been analyzed in the same manner as experimental data, in particular by applying the Pulse Height Weighting Technique. The simulations have been validated against a measurement of the neutron background performed with a nat-C sample, showing an excellent agreement above 1 keV. At lower energies, an additional component in the measured nat-C yield has been discovered, which prevents the use of nat-C data for neutron background estimates at neutron energies below a few hundred eV. The origin and time structure of the neutron background have been derived from the simulations. Examples of the neutron background for two different samples are demonstrating the important role of accurate simulations of the neutron background in capture cross-section measurements

  • A new CVD diamond mosaic-detector for (n, a) cross-section measurements at the n_TOF experiment at CERN

     Weiß, C.; Griesmayer, E.; Guerrero, Carlos; Altstadt, Sebastian; Andrzejewski, Józef; Audouin, Ludmila; Badurek, G.; Barbagallo, Massimo; Bécares, Vicente; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Hernandez Prieto, Alvaro; Riego Pérez, Albert
    Nuclear instruments and methods in physics research. Section A, accelerators SP
    Date of publication: 2013-08-02
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    At the n_TOF experiment at CERN a dedicated single-crystal chemical vapor deposition (sCVD) Diamond Mosaic-Detector has been developed for (n,a) cross-section measurements. The detector, characterized by an excellent time and energy resolution, consists of an array of 9 sCVD diamond diodes. The detector has been characterized and a cross-section measurement has been performed for the 59Ni(n,a)56Fe reaction in 2012. The characteristics of the detector, its performance and the promising preliminary results of the experiment are presented

    At then_TOFexperimentatCERNadedicatedsingle-crystalchemicalvapordeposition(sCVD)Diamond Mosaic-Detectorhasbeendevelopedfor(n,α) cross-sectionmeasurements.Thedetector,characterized by anexcellenttimeandenergyresolution,consistsofanarrayof9sCVDdiamonddiodes.Thedetector has beencharacterizedandacross-sectionmeasurementhasbeenperformedforthe 59Ni(n,α)56Fe reaction in2012.Thecharacteristicsofthedetector,itsperformanceandthepromisingpreliminary results oftheexperimentarepresented.

  • High-accuracy determination of the neutron flux at n TOF

     Barbagallo, Massimo; Guerrero, Carlos; Tsinganis, A.; Tarrío, D.; Altstadt, Sebastian; Andriamonje, S.; Andrzejewski, Józef; Audouin, Ludmila; Bécares, Vicente; Becvar, F.; Belloni, Fabio; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Hernandez Prieto, Alvaro; Riego Pérez, Albert
    European physical journal A
    Date of publication: 2013-12-18
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The neutron flux of the n TOF facility at CERN was measured, after installation of the new spallation target, with four different systems based on three neutron-converting reactions, which represent accepted cross sections standards in different energy regions. A careful comparison and combination of the different measurements allowed us to reach an unprecedented accuracy on the energy dependence of the neutron flux in the very wide range (thermal to 1 GeV) that characterizes the n TOF neutron beam. This is a pre-requisite for the high accuracy of cross section measurements at n TOF. An unexpected anomaly in the neutron-induced fission cross section of U-235 is observed in the energy region between 10 and 30 keV, hinting at a possible overestimation of this important cross section, well above currently assigned uncertainties.

    The neutron flux of the n TOF facility at CERN was measured, after installation of the new spallation target, with four different systems based on three neutron-converting reactions, which represent accepted cross sections standards in different energy regions. A careful comparison and combination of the different measurements allowed us to reach an unprecedented accuracy on the energy dependence of the neutron flux in the very wide range (thermal to 1 GeV) that characterizes the n TOF neutron beam. This is a pre-requisite for the high accuracy of cross section measurements at n TOF. An unexpected anomaly in the neutron-induced fission cross section of 235U is observed in the energy region between 10 and 30 keV, hinting at a possible overestimation of this important cross section, well above currently assigned uncertainties.

  • Measurement of the neutron background at the Canfranc Underground Laboratory LSC

     Jordan Herrero, Donato; Tain Enriquez, José Luis; Algora, Alejandro; Agramunt Ros, Jorge; Domingo Pardo, César; Gómez Hornillos, María Belén; Caballero Folch, Roger; Cortes Rossell, Guillem Pere; Cano Ott, Daniel; Mendoza Cembranos, Emilio; Bandac, Iulian; Bettini, Alessandro; Fraile, L; Domingo Miralles, Carles
    Astroparticle physics
    Date of publication: 2013
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The energy distribution of the neutron background was measured for the first time at Hall A of the Canfranc Underground Laboratory. For this purpose we used a novel approach based on the combination of the information obtained with six large high-pressure 3He proportional counters embedded in individual polyethylene blocks of different size. In this way not only the integral value but also the flux distribution as a function of neutron energy was determined in the range from 1 eV to 10 MeV.

  • Access to the full text
    Performance of the neutron time-of-flight facility n TOF at CERN  Open access

     Guerrero, Carlos; Tsinganis, A; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Hernandez Prieto, Alvaro; Riego Pérez, Albert; [et, al]
    European physical journal A
    Date of publication: 2013-02-25
    Journal article

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The neutron time-of-flight facility n TOF features a white neutron source produced by spallation through 20 GeV/c protons impinging on a lead target. The facility, aiming primarily at the measurement of neutron-induced reaction cross sections, was operating at CERN between 2001 and 2004, and then underwent a major upgrade in 2008. This paper presents in detail all the characteristics of the new neutron beam in the currently available configurations, which correspond to two different collimation systems and two choices of neutron moderator. The characteristics discussed include the intensity and energy dependence of the neutron flux, the spatial profile of the beam, the in-beam background components and the energy resolution/broadening. The discussion of these features is based on dedicated measurements and Monte Carlo simulations, and includes estimations of the systematic uncertainties of the mentioned quantities.

  • Neutron capture cross section of unstable 63-Ni: implications for stellar nucleosynthesis

     Lederer, Claudia; Massimi, Cristian; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; [et, al]
    Physical review letters
    Date of publication: 2013-01-09
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The 63Ni(n,γ) cross section has been measured for the first time at the neutron time-of-flight facility n_TOF at CERN from thermal neutron energies up to 200 keV. In total, capture kernels of 12 (new) resonances were determined. Maxwellian averaged cross sections were calculated for thermal energies from   kT=5–100  keV with uncertainties around 20%. Stellar model calculations for a 25M⊙ star show that the new data have a significant effect on the s-process production of 63Cu, 64Ni, and 64Zn in massive stars, allowing stronger constraints on the Cu yields from explosive nucleosynthesis in the subsequent supernova.

  • Simultaneous measurement of neutron-induced capture and fission reactions at CERN

     Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; [et, al]
    European physical journal A
    Date of publication: 2012
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Measurement of the fission fragment angular distribution for Th-232(n,f) at the CERN n-TOF facility

     Tarrío, D.; Tassan Got, Laurence; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert
    International Conference on Nuclear Reaction Mechanisms
    Presentation's date: 2012-06
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    A fission reaction chamber was designed to measure the angular distribution of the fragments emitted in neutron-induced fission reactions at n-TOF. Up to ten Parallel Plate Avalanche Counters can be included and kept at controlled low-pressure gas. Counters are tilted 45° with respect to the neutron beam direction and up to nine targets can be interleaved in between. A first measurement of the 232Th(n,f) was recently done and preliminary experimental results demonstrating the suitability of the setup are presented here.

  • ß-delayed neutron emission measurements around the third r-process abundance peak

     Caballero Folch, Roger; Domingo Pardo, César; Taín, J.L.; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Calviño Tavares, Francisco; Riego Pérez, Albert
    La Rábida, International Scientific Meeting on Nuclear Physics
    Presentation's date: 2012-09-09
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    This contribution summarizes an experiment performed at GSI (Germany) in the neutron-rich region beyond N=126. The aim of this measurement is to provide the nuclear physics input of relevance for r-process model calculations, aiming at a better understanding of the third r-process abundance peak. Many exotic nuclei were measured around 211Hg and 215Tl. Final ion identification diagrams are given in this contribution. For most of them, we expect to derive halflives and and ß -delayed neutron emission probabilities. The detectors used in this experiment were the Silicon IMplantation and Beta Absorber (SIMBA) detector, based on an array of highly segmentedsilicon detectors, and the BEta deLayEd Neutron (BELEN) detector, which consisted of 30 3He counters embedded in a polyethylene matrix.

  • Datos nucleares para física nuclear e ingeniería nuclear

     Gómez Hornillos, María Belén; Cortes Rossell, Guillem Pere; Poch Pares, Agusti; Riego Pérez, Albert; Pretel Sanchez, M. del Carmen; Caballero Folch, Roger; Calviño Tavares, Francisco
    Participation in a competitive project

     Share

  • Past, present and future of the n_TOF facility at CERN

     Calviño Tavares, Francisco; Gómez Hornillos, María Belén; Cortes Rossell, Guillem Pere
    Journal of the Korean Physical Society
    Date of publication: 2011-08-12
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Monte Carlo Simulations for the Study of a Moderated Neutron Detector

     Gómez Hornillos, María Belén; Gorlychev, V.; Caballero Folch, Roger; Cortes Rossell, Guillem Pere; Poch Pares, Agusti; Pretel Sanchez, M. del Carmen; Calviño Tavares, Francisco; Tain Enriquez, José Luis; Algora, Alejandro; Agramunt Ros, Jorge; Cano-Ott, D.; Martínez, T.; Mendoza Cembranos, Emilio; Rissanen, J.; Äystö, J.; Jokinen, Ari; Eronen, T.; Moore, I.; Penttila, H.
    Journal of the Korean Physical Society
    Date of publication: 2011-08-12
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Neutron measurements for advanced nuclear systems: The n_TOF project at CERN

     Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén
    Nuclear instruments and methods in physics research. Section B, beam interaction
    Date of publication: 2011-04-21
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    A few years ago, the neutron time-of-flight facility n_TOF was built at CERN to address some of the urgent needs of high-accuracy nuclear data for Accelerator Driven Systems and other advanced nuclear energy systems, as well as for nuclear astrophysics and fundamental nuclear physics. Thanks to the characteristics of the neutron beam, and to state-of-the-art detection and acquisition systems, high quality neutron cross-section data have been obtained for a variety of isotopes, many of which radioactive. Following an important upgrade of the spallation target and of the experimental area, a new measurement campaign has started last year. After a brief review of the most important results obtained so far at n_TOF, the new features of the facility are presented, together with the first results on the commissioning of the neutron beam. The plans for future measurements, in particular related to nuclear technology are finally discussed.

  • Beta decay studies of neutron rich nuclei using total absorption gamma-ray spectroscopy and delayed neutron measurements

     Tain Enriquez, José Luis; Algora, Alejandro; Estevez, E.; Rubio, B.; Valencia, E; Jordan Herrero, Donato; Äystö, J.; Eronen, T.; Jokinen, Ari; Moore, I.; Pentilla, H.; Riisanen, J.; Batist, L.; Bowry, M.; Bunce, M.; Gelletly, W.; Caballero Folch, Roger; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Gorlychev, V.; Cano-Ott, D.; García Sanz, Ángela; Martínez, T.; Dominco Pardo, C.; Fallot, M.; Giot, L.; Porta, A.; Van Vinh, B.
    Journal of the Korean Physical Society
    Date of publication: 2011-08-11
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    A complete characterisation of the β-decay of neutron-rich nuclei can be obtained from the measurement of β -delayed gamma rays and, whenever the process is energetically possible, β -delayed neutrons. The accurate determination of the β-intensity distribution and the β -delayed neutron emission probability is of great relevance in the elds of reactor technology and nuclear astrophysics. A programme for combined measurements using the total absorption gamma-ray spectroscopy technique and both neutron counters and neutron time-of-flight spectrometers is presented.

  • The Role of Fe and Ni for S-process Nucleosynthesis and Innovative Nuclear Technologies

     Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén
    Journal of the Korean Physical Society
    Date of publication: 2011-08-12
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Improved neutron capture cross section measurements with the n_TOF total absorption Cclorimeter

     Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; [et, al]
    Journal of the Korean Physical Society
    Date of publication: 2011-08-12
    Journal article

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The n TOF collaboration operates a Total Absorption Calorimeter (TAC) [1] for measuring neu- tron capture cross-sections of low-mass and/or radioactive samples. The results obtained with the TAC have led to a substantial improvement of the capture cross sections of 237Np and 240Pu [2]. The experience acquired during the rst measurements has allowed us to optimize the performance of the TAC and to improve the capture signal to background ratio, thus opening the way to more complex and demanding measurements on rare radioactive materials. The new design has been reached by a series of detailed Monte Carlo simulations of complete experiments and dedicated test measurements. The new capture setup will be presented and the main achievements highlighted.

  • Characterization of the New n_TOF Neutron Beam: Fluence, Prole and Resolution

     Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén
    Journal of the Korean Physical Society
    Date of publication: 2011-08-12
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • High-spin study of 162Ta

     Ghazi Moradi, F.; Back, T.; Cederwall, B; Sandzelius, M.; Atac, A.; Johnson, A.; Qi, C.; Liotta, R.; Gómez Hornillos, María Belén; [et, al]
    Physical review C
    Date of publication: 2011-12-13
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Access to the full text
    Present status and future programs of the n-TOF experiment  Open access

     Chiaveri, E.; Calviani, M.; Andriamonje, S.; Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Riego Pérez, Albert; Gómez Hornillos, María Belén; Vlachoudis, V.; Massimi, Cristian
    International Workshop on Compound Nuclear Reactions and Related Topics
    Presentation's date: 2011-09
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The neutron time-of-flight facility n_TOF at CERN, Switzerland, operational since 2001, delivers neutrons using the Proton Synchrotron (PS) 20 GeV/c proton beam impinging on a lead spallation target. The facility combines a very high instantaneous neutron flux, an excellent time of flight resolution due to the distance between the experimental area and the production target (185 meters), a low intrinsic background and a wide range of neutron energies, from thermal to GeV neutrons. These characteristics provide a unique possibility to perform neutron-induced capture and fission cross-section measurements for applications in nuclear astrophysics and in nuclear reactor technology. The most relevant measurements performed up to now and foreseen for the future will be presented in this contribution. The overall efficiency of the experimental program and the range of possible measurements achievable with the construction of a second experimental area (EAR-2), vertically located 20 m on top of the n_TOF spallation target, might offer a substantial improvement in measurement sensitivities. A feasibility study of the possible realisation of the installation extension will be also presented.

  • Competing quasiparticle configurations in 163W

     Thomson, J.; Joss, D.T.; Paul, E.S.; Scholey, C.; Simpson, J.; Ertürk, S.; Bianco, L; Cederwall, B.; Darby, I.G.; Eeckhaudt, S.; Gómez Hornillos, María Belén; Grahn, T.; Greenlees, P.T.; Hadinia, B; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Leino, M.; Nyman, M.; O'Donnell, D.; Page, R.D.; Pakarinen, J.; Rahkila, P.; Rowley, N.; Sandzelius, M.; Sapple, P.J.; Sarén, J.; Sorri, J; Uusitalo, J.
    Physical review C
    Date of publication: 2010-01-15
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • MATS and LaSpec: high-precision experiments using ion traps and lasers at FAIR

     Muñoz Rodri¿uez, Daniel; Blaum, K.; Nörtershäuser, W.; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén
    European physical journal. Special topics
    Date of publication: 2010-05-01
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Isomeric and ground-state properties of 171Pt, 167Os, and 163W

     Scholey, C.; Andgren, K.; Bianco, L; Cederwall, B; Darby, I.G.; Eeckhaudt, S.; Ertürk, S.; Gómez Hornillos, María Belén; Grahn, T.; Greenlees, P.T.; Hadinia, B; Ideguchi, E.; Jones, P.; Joss, D.T.; Julin, R.; Juutinen, S.; Ketelhut, S.; Leino, M.; Leppänen, A. P.; Nieminen, P.; Niikura, M.; Nyman, M.; O'Donnell, D.; Page, R.D.; Pakarinen, J.; Rahkila, P.; Sarén, J.; Sandzelius, M.; Simpson, J.; Sorri, J.; Thomson, J.; Uusitalo, J.; Venhart, M.
    Physical review C
    Date of publication: 2010-01-15
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Lifetimes of odd-spin yrast states in 182Hg

     Scheck, M.; Grahn, T.; Petts, A.; Butler, P.A.; Dewald, A; Gaffney, L.P.; Gómez Hornillos, María Belén; Görgen, A; Greenlees, P.T.; Helariutta, K.; Jolie, J.; Jones, P.; Julin, R.; Juutinen, S.; Ketelhut, S.; Kröll, T; Krücken, R; Leino, M.; Ljungvall, J; Maierbeck, P.; Melon, B; Nyman, M.; Page, R.D.; Pakarinen, J.; Paul, E.S.; Pissulla, Th; Rahkila, P.; Sarén, J.; Scholey, C.; Semchenkov, A.; Sorri, J.; Uusitalo, J.; Wadsworth, R; Zielinska, M.
    Physical review C
    Date of publication: 2010-01-22
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Discovery of 157W and 161Os

     Bianco, L; Page, R.D.; Darby, I.G.; Joss, D.T.; Simpson, J.; Al-khalili, J.S.; Cannon, A.J.; Cederwall, B.; Eeckhaudt, S.; Ertürk, S.; Gall, B.; Gómez Hornillos, María Belén; Grahn, T.; Greenlees, P.T.; Hadinia, B; Heyde, K.; Jakobsson, U.; Jones, P.M.; Julin, R.; Juutinen, S.; Ketelhut, S.; Labiche, M.; Leino, M.; Leppänen, A. P.; Nyman, M.; O'Donnell, D.; Paul, E.S.; Petri, M.; Peura, P.; Puurunen, A.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sapple, P.J.; Sarén, J.; Scholey, C.; Smirnova, N.A.; Steer, A.; Stevenson, P.D.; Suckling, E.B.; Thomson, J.; Uusitalo, J.; Venhart, M.
    Physics letters B
    Date of publication: 2010-05-05
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Access to the full text
    Commissionning of the n_TOF-Ph2 facility  Open access

     Calviño Tavares, Francisco; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén
    PHYSOR 2010 ¿ Advances in Reactor Physics to Power the Nuclear Renaissance
    Presentation's date: 2010
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The white spectrum neutron time-of-flight facility n_TOF is operating at CERN since 2001. The neutron beam has a very high instantaneous flux and high resolution in energy and it is delivered in the experimental area located 187 m downstream from the spallation target. The intense neutron fluence per proton burst results in a much enhanced signal to background ratio for neutron capture and fission reactions on radioactive isotopes, thus making the facility well suited for accurate measurement of neutron-induced reaction cross-sections. This is especially true to highly radioactive targets which are of major importance in new nuclear energy system such as Gen-IV reactors, especially those with fast spectrum. Combined with state-of-the-art detectors and with advanced data acquisition systems, the innovative characteristics of the n_TOF neutron beam allow collecting data on a variety of stable and radioactive isotopes of interest for nuclear astrophysics and for applications to advanced reactor technologies.

  • First measurements with the BEta deLayEd Neutron Detector (BELEN-20) at JYFLTRAP

     Gómez Hornillos, María Belén; Rissanen, J.; Tain Enriquez, José Luis; Algora, Alejandro; Cano Ott, Daniel; Agramunt Ros, Jorge; Gorlychev, V.; Caballero Folch, Roger; Martínez, T.; Achouri, L.; Äystö, J.; Cortes Rossell, Guillem Pere; Elomaa, V.V.; Eronen, T.; García Sanz, Ángela; Hakala, P.J.; Jokinen, Ari; Karvonen, P.; Kolhinen, V.S.; Moore, I.; Parlog, M.; Penttila, H.; Podolyak, Z.; Pretel Sanchez, M. del Carmen; Reponen, M.; Sonnenschein, V.; Valencia, E
    International Nuclear Physics Conference
    Presentation's date: 2010
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    A prototype version of the BEta deLayEd Neutron detector, which is being developed for the FAIR/DESPEC experiment, has been used for the first time in an experiment at JYFL (Finland). This detector is based on 3He counters and its first run was primarily intended to commission the detector and verify the working principles for future experiments. A new triggerless DAQ has been developed for these measurements. This DAQ time-stamps the events and allows complete flexibility to construct correlations offline. An isotopically pure beam was obtained using the JYFLTRAP Penning trap setup at the IGISOL facility and it was implanted on a movable tape placed in the centre of the BELEN-20 detector. The measurements were performed for known delayed neutron emitters of interest for nuclear power generation: 88Br, 94,95Rb, 138I. The characteristics of the BELEN-20 detector and the first experiment at JYFL are presented in this paper.

  • Contribución española a los gastos mantenimiento y operación del experimento N_TOF(CERN)para el año 2010

     Calviño Tavares, Francisco; Poch Pares, Agusti; Pretel Sanchez, M. del Carmen; Gómez Hornillos, María Belén; Cortes Rossell, Guillem Pere
    Participation in a competitive project

     Share

  • Gamma-ray spectroscopy of 163Ta

     Sandzelius, M.; Cederwall, B.; Ganioglu, E.; Thomson, J.; Andgren, K.; Bianco, L.; Back, T.; Eeckhaudt, S.; Ertürk, S.; Gómez Hornillos, María Belén; Grahn, T; Greenlees, P.T.; Hadinia, B; Johson, A.; Jones, P.M.; Joss, D.T.; Julin, R.; Juutinen, S.; Ketelhut, S.; Khaplanov, A.; Leino, M.; Nyman, M.; Page, R.D.; Rahkila, P.; Sarén, J.; Scholey, C.; Simpson, J.; Sorri, J; Uusitalo, J.; Wyss, R.
    Physical review C
    Date of publication: 2009-11-29
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Identification of gamma-rays from 172Au and a decays of 172Au, 168Ir, and 164Re

     Hadinia, B; Cederwall, B.; Page, R.D.; Sandzelius, M.; Scholey, C.; Andgren, K.; Back, T.; Ganioglu, E.; Gómez Hornillos, María Belén; Grahn, T.; Greenlees, P.T.; Ideguchi, E.; Jakobsson, U.; Johnson, A.; Jones, P.M.; Julin, R.; Juutinen, S.; Ketelhut, S.; Khaplanov, A.; Leino, M.; Niikura, M; Nyman, M.; Ozgur, I.; Paul, E.S.; Peura, P.; Rahkila, P.; Sarén, J.; Sorri, J.; Uusitalo, J.; Wyss, R.
    Physical review C
    Date of publication: 2009-12-10
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Lifetime Measurements and Coulomb Excitation of Light Hg Nuclei

     Petts, A; Butler, P.A.; Grahn, T; Blazhev, A; Bree, N; Bruyneel, B; Cederkäll, J; Clement, E; Cocolios, T.E.; Dewald, A; Eberth, J.; Fraile, L; Fransen, C; Gómez Hornillos, María Belén; Greenlees, P.T.; Görgen, A; Guttormsen, M; Hadynska, K.; Helariutta, K.; Herzberg, R. D.; Huyse, M; Jenkins, D.G.; Jolie, J.; Jones, P.; Julin, R.; Juutinen, S; Ketelhut, S.; Knapen, S.; Kröll, T; Krücken, R; Larsen, A.C.; Leino, M; Ljungvall, J; Maierbeck, P.; Marley, P.L.; Melon, B; Napiorkowski, P.J.; Nyman, M; Page, R.D.; Pakarinen, J.; Pascovini, G; Patronis, N.; Peura, P.; Piselli, E.; Pissulla, Th; Rahkila, P.; Reiter, P.; Sarén, J.; Scheck, M.; Scholey, C.; Semchenkov, A.; Siem, S.; Stefanescu, I.; Sorri, J; Uusitalo, J.; Van de Walle, J.; Van Duppen, P.; Voulot, D.; Wadsworth, R; Weisshaar, D.; Wenander, F.; Zielinska, M.
    AIP Conference proceedings
    Date of publication: 2009-01
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Spectroscopy of the neutron-deficient nucleus 167Os91

     O'Donnell, D.; Grahn, T; Joss, D.T.; Simpson, J.; Scholey, C.; Andgren, K.; Bianco, L; Cederwall, B; Cullen, DM.; Dewald, A; Ganioglu, E.; Gómez Hornillos, María Belén; Greenlees, P.T.; Hadinia, B; Iwasaki, H.; Jakobsson, U.; Jolie, J.; Jones, P.; Judson, DS; Julin, R.; Juutinen, S; Ketelhut, S.; Labiche, M.; Leino, M; Lumley, NM; Mason, PJR; Moller, O.; Nieminen, P.; Nyman, M; Page, R.D.; Pakarinen, J.; Paul, ES; Petri, M.; Petts, A; Peura, P.; Pietrella, N.; Pissulla, Th; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sapple, P.J.; Saren, J.; Sorri, J; Thomson, J.; Uusitalo, J.; Watkins, HW
    Physical review C
    Date of publication: 2009-06
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Evolution of collectivity in Hg-180 and Hg-182

     Grahn, T; Petts, A; Scheck, M.; Butler, P.A.; Dewald, A; Gómez Hornillos, María Belén; Greenlees, P.T.; Görgen, A; Helariutta, K.; Jolie, J.; Jones, P.; Julin, R.; Juutinen, S; Ketelhut, S.; Krücken, R; Kröll, T; Leino, M; Ljungvall, J; Maierbeck, P.; Melon, B; Nyman, M; Page, R.D.; Pissulla, Th; Rahkila, P.; Sarén, J.; Scholey, C.; Semchenkov, A.; Sorri, J; Uusitalo, J.; Wadsworth, R; Zielinska, M.
    Physical review C
    Date of publication: 2009-01
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • 2009-SGR-1068 Grup de Recerca Consolidat (Transmutació de Residus Radioactius)

     Cortes Rossell, Guillem Pere; Pretel Sanchez, M. del Carmen; Calviño Tavares, Francisco; Poch Pares, Agusti; Gómez Hornillos, María Belén
    Participation in a competitive project

     Share

  • FPA2008-04972-C03-03 Datos nucleares para física nuclear e ingeniería nuclear

     Cano Ott, Daniel; Gómez Hornillos, María Belén
    Participation in a competitive project

     Share

  • FPA2008-04972-C03-03 Datos Nucleares Para Física Nuclear e Ingeniería Nuclear

     Pretel Sanchez, M. del Carmen; Cortes Rossell, Guillem Pere; Poch Pares, Agusti; Gómez Hornillos, María Belén; Caballero Folch, Roger; Riego Pérez, Albert; Calviño Tavares, Francisco
    Participation in a competitive project

     Share

  • CENTRO NACIONAL DE FÍSICA DE PARTÍCULAS,ASTROPARTÍCULAS Y NUCLEAR (CPAN)

     Caballero Folch, Roger; Cortes Rossell, Guillem Pere; Gómez Hornillos, María Belén; Calviño Tavares, Francisco
    Participation in a competitive project

     Share

  • Spectroscopy of the neutron-deficient isobars 163Re and 163W using tagging techniques

     Joss, DT; Thomson, J.; Scholey, C.; Erturk, S.; Simpson, J.; Page, R.D.; Bianco, L.; Cederwall, B.; Darby, I.G.; Eeckhaudt, S.; Gómez Hornillos, María Belén; Grahn, T.; Greenlees, P.T.; Jones, P.M.; Julin, R.; Juutinen, S.; Ketelhut, S.; Lagergren, K.; Leino, M.; Leppannen, A.P.; Nyman, M.; O'Donnel, D; Pakarinen, J.; Paul, E.S.; Rahkila, P.; Sandzelius, M.; Sorri, J.; Sarén, J.; Uusitalo, J.; Venhart, M.
    AIP Conference proceedings
    Date of publication: 2008-11-11
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Direct mass measurements of Se-68 and Y-80

     Gómez Hornillos, María Belén
    Physical review C
    Date of publication: 2008-07
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Experimental study of resonance states in H-7 and H-6

     Caamaño, Manuel; Cortina Gil, Dolores; Mittig, W.; Savajols, Hervé; Chartier, M.; Demonchy, C.E.; Fernández, B.; Gómez Hornillos, María Belén; Gillibert, A.; Jurado, B.; Kiselev, O.; Lemmon, R.; Obertelli, A.; Rejmund, F.; Rejmund, M.; Roussel-Chomaz, P.; Wolski, R.
    Physical review C
    Date of publication: 2008-10
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Probing collectivity in the vicinity of neutron deficient Pb nuclei

     Grahn, T; Dewald, A; Gómez Hornillos, María Belén; Greenlees, P.T.; Görgen, A; Helariutta, K.; Jones, P.; Jolie, J.; Julin, R.; Juutinen, S; Ketelhut, S.; Krücken, R; Kröll, T; Leino, M; Petts, A; Ljungvall, J; Maierbeck, P.; Nyman, M; Page, R.D.; Melon, B; Petts, A.; Pissulla, Th; Rahkila, P.; Sarén, J.; Scholey, C.; Sorri, J; Uusitalo, J.; Wadsworth, R; Zielinska, M.
    AIP Conference proceedings
    Date of publication: 2008-01
    Journal article

     Share Reference managers Reference managers Open in new window

  • Alpha-Decay branching ratios measured by gamma-ray tagging

     Bianco, L; Page, R.D.; Joss, D.T.; Simpson, J.; Cederwall, B; Gómez Hornillos, María Belén; Greenlees, P.T.; Hadinia, B; Jakobsson, U.; Jones, P.M.; Julin, R.; Ketelhut, S.; Labiche, M.; Leino, M; Nyman, M; Paul, E.S.; Petri, M.; Peura, P.; Puurunen, A.; Rahkila, P.; Ruotsalainen, P.; Sandzelius, M.; Sapple, P.J.; Sarén, J.; Scholey, C.; Thomson, J.; Uusitalo, J.
    Nuclear instruments and methods in physics research. Section A, accelerators SP
    Date of publication: 2008-12
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Resonance state in H-7

     Caamaño, Manuel; Cortina Gil, Dolores; Mittig, W.; Savajols, Hervé; Chartier, M.; Demonchy, C.E.; Fernández, B.; Gómez Hornillos, María Belén; Gillibert, A.; Jurado, B.; Kiselev, O.; Lemmon, R.; Obertelli, A.; Rejmund, F.; Rejmund, M.; Roussel-Chomaz, P.; Wolski, R.
    Physical review letters
    Date of publication: 2007-08
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Production and characterization of the H-7 resonance

     Caamaño, Manuel; Cortina Gil, Dolores; Demonchy, C.E.; Jurado, B.; Mittig, W.; Rejmund, F.; Rejmund, M.; Roussel-Chomaz, P.; Savajols, Hervé; Chartier, M.; Fernández, B.; Gómez Hornillos, María Belén; Gillibert, A.; Obertelli, A.; Kiselev, O.; Lemmon, R.; Wolski, R.
    AIP Conference proceedings
    Date of publication: 2007-05
    Journal article

     Share Reference managers Reference managers Open in new window

  • The search for H-7

     Caamaño, Manuel; Cortina Gil, Dolores; Mittig, W.; Savajols, Hervé; Chartier, M.; Demonchy, C.E.; Fernández, B.; Gillibert, A.; Gómez Hornillos, María Belén; Jurado, B.; Kiselev, O.; Lemmon, R.; Obertelli, A.; Rejmund, F.; Rejmund, M.; Roussel-Chomaz, P.; Wolski, R.
    European physical journal. Special topics
    Date of publication: 2007-11
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • alpha decay of Re-159 and proton emission from Ta-155

     Page, R.D.; Bianco, L; Darby, I.G.; Uusitalo, J.; Joss, D.T.; Grahn, T; Herzberg, R. D.; Pakarinen, J.; Thomson, J.; Eeckhaudt, S.; Greenlees, P.T.; Jones, P.M.; Julin, R.; Juutinen, S; Ketelhut, S.; Leino, M; Leppänen, A. P.; Nyman, M; Rahkila, P.; Sarén, J.; Scholey, C.; Steer, A.; Gómez Hornillos, María Belén; Al-khalili, J.S.; Cannon, A.J.; Stevenson, P.D.; Ertürk, S.; Gall, B.; Hadinia, B; Venhart, M.; Simpson, J.
    Physical review C
    Date of publication: 2007-06
    Journal article

    View View Open in new window  Share Reference managers Reference managers Open in new window