The decays of 82a+82bAs and 79Ge

Excited states inAs82studied in the decay ofGe82

“…Literature survey The spins of the ground state and the isomeric state were previously assigned on the basis of the incomplete β-decay schemes for 82 Ge and 82 As gs,m and on systematics. In the work of van Klinken et al [6] we find an extensive discussion of the spin assignments. The authors argue that strong feeding to the 82 Se ground state indicates 1 + for the ground state of 82 As.…”

“…[8] (25(25)%) and the results from this work (< 11%). The source of this large discrepancy is an assumption that all unobserved β transitions are feeding the ground state [6].…”

“…In all isotones between Z = 31 and 37 several low lying long-lived isomers decaying by β-emission have been identified. An isomeric state in 82 As has been already found in 1970 [6], but its mass was unknown for over 35 years until recently the masses of the ground and the isomeric state were measured with a Penning trap [7]. There are different proposals for the spins of the ground and the isomeric state, including 2 − [8,9] The decay of 82 Ge to 82 As is rather poorly known.…”

Decay properties andQβvalue ofAs82

“…The decay of 82 As has been investigated several times in the past [2,1,3], but important data on details of the decay are still missing. It is known that there are two isomers in 82 As, but the relative positions of these two levels have so far not been determined.…”

“…[1,2] coincidence with a 1731 keV transition. The strong 2835 keV transition was now found to depopulate a new state at 4244 keV, with a probable assignment of 1 − .…”