βdecay of66Co,68

Search for shape-coexisting 0+ states in Ni66 from lifetime measurements

“…3. The identification of γ rays in 66 Ni is based on the existing information [10]. Despite having ∼50 times more statistics than the previous β-decay experiment [10] only one new transition of 2231.9 keV has been observed.…”

“…The identification of γ rays in 66 Ni is based on the existing information [10]. Despite having ∼50 times more statistics than the previous β-decay experiment [10] only one new transition of 2231.9 keV has been observed. This transition is in clear coincidence with the 1425-keV γ-ray, but it is not observed in the singles spectrum, so its placement in the level scheme is uncertain.…”

“…Large-scale Shell Model calculations using the Lenzi-Nowacki-Poves-Sieja (LNPS) interaction [3,[5][6][7] Thanks to the great effort put into studying this particular nucleus over the recent decades shape coexistence in 68 Ni is well established both from an experimental [3,[9][10][11][12] and a theoretical point of view [3,5,8]. But the situation is not that clear for nuclei around it.…”

Low-energy level schemes of66,68Fe and inferred proton and neutron excitations acrossZ=28Liddick1, Abromeit2, Ayres3 et al. 2013Phys. Rev. C217126View full textAdd to dashboardCite

“…The decay curve was fit with contributions from 68 Mn, 68 Fe, and 68 Co. The half-lives of 68 Fe and 68 Co were fixed at values of 180 [16] and 1600 ms [29] respectively. The half-life of 68 Mn was determined to be 40(7) ms slightly shorter than obtained previously, 51(4) ms [12], but with a lower precision.…”

“…2. The half-life of the daughter, 66 Fe and granddaughter 66 Co were fixed at 351 ms [17,[26][27][28] and 180 ms [27,29,30] respectively. The errors on the daughter (6 ms) and granddaughter (10 ms) did not contribute significantly to the error of the extracted 66 Mn half-life.…”