The ground state mass of147Gd from single-neutron-transfer reactions and its impact on derived mass values

Abstract

Using a 14SGd radioactive target and the (p, d), (d, t), and (3He, c~) single neutron pick-up reactions we have measured the 147Gd mass excess as -75,366(4)keV, which differs by 139(24) keV from the adopted value of the 1983 mass table. From this result, and from recently reported first transfer-reaction mass determinations for 14SEu and 146Eu, we have recalculated the masses of nuclei above 146Gd from a previous shell model analysis of high-spin states.

Multiparticle- and particle x octupole states in 65 149 Tb84

“…The E2 transition strength is in accord with the large effective charge values found for the f7/2 neutron in this region [l]. 23/2 -) = 6.9 (14). These transitions were measured to be of dominant E3 character, with B(E3) values of 39Bw and 28Bw, whereas their M2 components were close to 10-2 Bw" The multipole mixing ratio is not determined for the 846 keV line in a49Tb, but assuming pure multipolarities the transition would have B(M2, 846 keV 27/2 + ~ 23/2-)=2.1(4)/~2 fm 2 =4.5(9) x 10-2Bw(M2) or B (E 3, 846 keV 27/2 + --.…”

Beta-decay of 27/2? isomers inN=83 nuclei

“…The intensities in the ~51Ho daughter nucleus are drawn ten times enhanced. The 151Er Q~c-value is taken from [11] ment of keeping both the 0 + proton pair and the (7zh21/2) 10 + configuration intact, the reduction is uniquely specified. Using the excitation energies [8,9] of the 15~ and 14SDy 10 + states and of the 27/2-state in a49Dy, we calculate the excitation of the ~5~Er 27/2-isomer from the experimental excitation energies E~,z~ and the corresponding ground-state masses Mz, ~ as with the masses taken from [11].…”

β +-endpoint measurements near100Sn and146Gd

“…The reliability of our value can be judged from Fig. On the other hand, our endpoint is higher by approximately 100 keV than the prediction from a shell-model analysis [30,31] (see Sect. 2.…”