Phys.Rev. C 108, 024307 (2023)

D.J.Hartley, F.G.Kondev, M.P.Carpenter, J.A.Clark, P.Copp, B.Kay, T.Lauritsen, G.Savard, D.Seweryniak, G.L.Wilson, J.Wu

First b^--decay spectroscopy study of ¹⁵⁷Nd

RADIOACTIVITY ¹⁵⁷Nd(β^-)[from ²⁵²Cf(SF)]; measured Eγ, Iγ, Eβ, Iβ, βγ-coin, βγγ-coin; deduced T_1/2, logft, branchings, β-feedings. ¹⁵⁷Pm; deduced levels, J, π, configurations. Systematics of relative energies of quasiproton orbitals observed in promethium, europium, and terbium N =90, 92, 94, and 96 nuclei - ¹⁵¹Pm, ¹⁵³Pm, ¹⁵⁵Pm, ¹⁵⁷Pm, ¹⁵³Eu, ¹⁵⁵Pm, ¹⁵⁷Pm, ¹⁵⁹Pm, ¹⁵⁵Tb, ¹⁵⁷Tb, ¹⁵⁹Tb, ¹⁶¹Tb. Separated A=157 beam from CARIBU source delivered to the SATURN moving tape collection system, which was surrounded by X-Array spectrometer comprised of 5 germanium clover detectors plastic scintillators.

doi: 10.1103/PhysRevC.108.024307