Nuclear Data Sheets for A = 86

Total absorption spectroscopy study of the β decay of Br86 and Rb91Rice1, Algora2, Taín3 et al. 2017Phys. Rev. C386260View full textAdd to dashboardCite

“…5, in particular analysis B, with the optimized branching-ratio matrix, which provides a larger ground-state feeding value. As in the 91 Rb case, the two total absorption results clearly differ from the ENSDF data [42] based on high-resolution measurements, which points to a decay suffering from the Pandemonium effect. From our conventional analysis (analysis A), a ground-state feeding of 15.01% is obtained, the optimized branching-ratio-matrix analysis result is larger, amounting to 20.23%, but still in agreement with the ENSDF value within the error interval [15(8)%].…”

“…Up to the level at an excitation energy of 3099 keV, only two levels have uncertain spin-parity assignments. In addition, a recent ENSDF evaluation [42] has included some new levels from a 86 Kr(n,n ) 86 Kr study from Fotiades et al [43] and slightly revised the excitation energies of some levels compared with the earlier evaluation [44].…”

“…Previously, the spin-parity assignment of this state was J π = 2 − , based on the systematics from 82-84 Br, but a relatively recent study by Porquet et al [45] suggested a possible 1 − assignment arising from the lowest-energy state in the πp 3/2 νd 5/2 multiplet. This new value has been assigned to the ground state in the new ENSDF evaluation [42]. In our analyses both options were used, the 1 − cases providing better fits of the total absorption data, in particular to the region of the spectra around the peak at 2250 keV and in the region between 3500 and 4000 keV.…”

Triaxiality of neutron-rich Ge84,86,88 from low-energy nuclear spectra

“…It maintains a rather high value at N = 58 before it significantly drops at the onset of collectivity at N = 60. For Sr [50][51][52][53][54]56], Kr [50][51][52][53]56,57], and Se [49,57,59] isotopes, no such peaking of the 2 + 1 energies is found, but rather a flat behavior up to N = 58. Nevertheless, a slight increase in the 2 + 1 energy at N = 56 is observed for 92 Kr and 88 Ge (this work).…”

Nuclear structure and decay data evaluation in Europe

“…Following a few years of activity in the field and after the competion of two full mass chain evaluations in collaboration with an experienced evaluator [9,10], the group from IFIN-HH became in 2015 one of the NSDD Data Centres. Two scientist dedicate 20% of their working time to this activity.…”