The β-decay properties of the very neutron-rich Ge84 nucleus were studied at the Holifield Radioactive Ion Beam Facility at Oak Ridge National Laboratory. Several new γ-transitions and levels were added to its decay scheme and the order of the two lowest-lying levels in the daughter As84 was corrected. For the first time γ radiation following β-delayed neutron emission was observed. The shell-model calculations and apparent β transition intensities were used to guide the spin assignment to the As84 levels, in particular for the low-energy part of the level scheme. The new spin-parity (2-) proposed for the ground state of As84 is supported also by the systematics of N=51 isotones.
Publication Source (Journal or Book title)
Physical Review C
Korgul, A., Rykaczewski, K., Grzywacz, R., Bingham, C., Brewer, N., Gross, C., Ciemny, A., Jost, C., Karny, M., Madurga, M., Mazzocchi, C., Mendez, A., Miernik, K., Miller, D., Padgett, S., Paulauskas, S., Piersa, M., Stracener, D., Stryjczyk, M., Wolińska-Cichocka, M., & Zganjar, E. (2016). β and β-n decay of the neutron-rich Ge 84 nucleus. Physical Review C, 93 (6) https://doi.org/10.1103/PhysRevC.93.064324