beta and beta-n decay of the neutron-rich Ge-84 nucleus

Korgul, A; Rykaczewski, KP; Grzywacz, RK; Bingham, CR; Brewer, NT; Gross, CJ; Ciemny, AA; Jost, C; Karny, M; Madurga, M; Mazzocchi, C; Mendez, II; Miernik, K; Miller, D; Padgett, S; Paulauskas, SV; Piersa, M; Stracener, DW; Stryjczyk, Marek; Wolinska-Cichocka, M; Zganjar, EF

doi:10.1103/PhysRevC.93.064324

beta and beta-n decay of the neutron-rich Ge-84 nucleus

Author:

Korgul, A

Rykaczewski, KP ; Grzywacz, RK ; Bingham, CR ; Brewer, NT ; Gross, CJ ; Ciemny, AA ; Jost, C ; Karny, M ; Madurga, M ; Mazzocchi, C ; Mendez, II ; Miernik, K ; Miller, D ; Padgett, S ; Paulauskas, SV ; Piersa, M ; Stracener, DW ; Stryjczyk, Marek ; Wolinska-Cichocka, M ; Zganjar, EF

Keywords:

Science & Technology, Physical Sciences, Physics, Nuclear, Physics, ISOTOPES, HRIBF, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Nuclear & Particles Physics, 5106 Nuclear and plasma physics

Abstract:

The β-decay properties of the very neutron-rich 84Ge 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 84As 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 84As levels, in particular for the low-energy part of the level scheme. The new spin-parity (2−) proposed for the ground state of 84As is supported also by the systematics of N=51 isotones.