Large β-delayed neutron emission probabilities in the Ni78 region
The β-delayed neutron branching ratios (Pβn) for nuclei near doubly magic Ni78 have been directly measured using a new method combining high-resolution mass separation, reacceleration, and digital β-γ spectroscopy of U238 fission products. The Pβn values for the very neutron-rich isotopes Cu76-78 and Ga83 were found to be much higher than previously reported and predicted. Revised calculations of the βn process, accounting for new mass measurements and an inversion of the π2p3/2 and π1f5/2 orbitals, are in better agreement with these new experimental results. © 2009 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Winger, J., Ilyushkin, S., Rykaczewski, K., Gross, C., Batchelder, J., Goodin, C., Grzywacz, R., Hamilton, J., Korgul, A., Królas, W., Liddick, S., Mazzocchi, C., Padgett, S., Piechaczek, A., Rajabali, M., Shapira, D., Zganjar, E., & Borzov, I. (2009). Large β-delayed neutron emission probabilities in the Ni78 region. Physical Review Letters, 102 (14) https://doi.org/10.1103/PhysRevLett.102.142502