Phys.Rev. C 91, 054301 (2015)

J.M.Rees, E.S.Paul, J.Simpson, M.A.Riley, A.D.Ayangeakaa, M.P.Carpenter, C.J.Chiara, U.Garg, P.Hampson, D.J.Hartley, C.R.Hoffman, R.V.F.Janssens, F.G.Kondev, T.Lauritsen, P.J.R.Mason, J.Matta, S.L.Miller, P.J.Nolan, J.Ollier, M.Petri, D.C.Radford, J.P.Revill, X.Wang, S.Zhu, J.Gellanki, I.Ragnarsson

High-spin terminating states in the N=88 ¹⁵⁵Ho and ¹⁵⁶Er isotones

NUCLEAR REACTIONS ¹²⁴Sn(³⁷Cl, 6n)¹⁵⁵Ho, E=180 MeV; ¹¹⁴Cd(⁴⁸Ca, 6n)¹⁵⁶Er, E=215 MeV; measured Eγ, Iγ, γγ-coin, angular intensity ratios using Gammasphere array at ATLAS-ANL facility. ¹⁵⁵Ho, ¹⁵⁶Er; deduced high-spin levels, J, π, multipolarity, bands, non-collective oblate states in ¹⁵⁵Ho, γ-branching ratios and B(M1)/B(E2) for ¹⁵⁵Ho, alignments, configurations, staggering parameter; calculated Tilted Fermi-surface diagrams. Comparison with cranked Nilsson-Strutinsky calculations, and with structure of N=88 isotones ¹⁵⁴Dy, ¹⁵⁵Ho and ¹⁵⁶Er.

doi: 10.1103/PhysRevC.91.054301