Phys.Rev. C 102, 064321 (2020)

W.Urban, T.Rzaca-Urban, A.G.Smith, G.S.Simpson, J.P.Greene

First observation of excited states in the ¹⁵⁴Ce₉₆ nucleus: Rigid rotation at Z = 58

RADIOACTIVITY ²⁴⁸Cm, ²⁵²Cf(SF); measured Eγ, Iγ, γγ-coin, population of even-even Ce isotopes using the Eurogam2 and Gammasphere arrays. ¹⁵⁴Ce; deduced levels, J, π, rotational band up to 8+. ^140,142,144Xe, ^{142,144,146,148,150}Ba, ^{146,148,150,152}Ce, ^{150,152,154,156}Nd, ^156,158,160Sm, ^160,162,164Gd; measured Eγ for ground-state bands up to 8+, and compared to literature values. Systematics of excited 0+ states in N=88 and N=90 isotones of Ba, Ce, Nd, Sm, Gd, Dy and Er. Systematics of E(first 4+)/E(first 2+) of N=90, 92, 94 and 96 isotones of Ba to Hf isotopes, and for N(even)=90-106, Z(even)=56-66 nuclei.

doi: 10.1103/PhysRevC.102.064321