Nuclear Structure and Decay Data for A=71 Isobars

Abstract

Experimental nuclear spectroscopic data are evaluated for 12 known nuclides of mass number=71 (Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Br, Kr). Detailed compiled and evaluated information is presented for each reaction and decay experiment. The β⁻n decay of ⁷²Co to ⁷¹Ni is included in this work, while for β⁻n decay of ⁷¹Co to ⁷⁰Ni, consult Nuclear Data Sheets for A=70 (2016Gu11) or the ENSDF database for ⁷⁰Ni. Combining all the available data, recommended values are provided for energies, spins and parities, and half-lives of levels, with energies, branching ratios and multipolarities of γ radiations, and characteristics of β and α radiations in radioactive decays. Excited-states have not yet been identified in ⁷¹Mn, ⁷¹Fe, and ⁷¹Kr, with the ground-state half-life remaining unknown only for ⁷¹Mn; data for excited states in ⁷¹Co and ⁷¹Ni are very limited; ⁷¹Ga, ⁷¹Ge and ⁷¹As are the most extensively studied nuclides via various reactions and decays, followed by ⁷¹Cu, ⁷¹Zn, ⁷¹Se, and ⁷¹Br, however, except for ⁷¹Ge, the decay schemes of all other nuclides are considered as incomplete due to a large gap between the decay Q-value and the highest observed level. This work supersedes earlier evaluations of A=71 by 2011Ab01.