A new accurate determination of beta-delayed neutron emission probabilities from nuclei in the low mass region of the light fission group has been performed. The measurements were carried out using the BELEN 4 pi neutron counter at the IGISOL-JYFL mass separator in combination with a Penning trap. The new results significantly improve the uncertainties of neutron emission probabilities for Br-91, As-86, As-85, and Ge-85 nuclei.
Äystö, J. [et al.]. New Beta-delayed neutron measurements in the light-mass fission group. "Nuclear data sheets", 01 Juny 2014, vol. 120, p. 74-77.