Phys.Rev. C 88, 034302 (2013)

T.Rzaca-Urban, M.Czerwinski, W.Urban, A.G.Smith, I.Ahmad, F.Nowacki, K.Sieja

First observation of excited states in ⁸⁷Se: Collectivity and j- 1 anomaly at N=53

RADIOACTIVITY ²⁴⁸Cm(SF); measured Eγ, Iγ, γγ-coin with γ rays from complementary fragments, γγ(θ) using Eurogam2 array; deduced mass correlations. ⁸⁷Se; deduced levels, J, π, multipolarity, configuration, coexistence of collective and single-particle excitations. Comparison with shell model calculations, and with structure of N=53 neighbors. ^86,88Se, ^146,148Ce, ^156,158,160Sm; observed γ rays.

NUCLEAR STRUCTURE ⁸⁵Ge, ⁸⁷Se, ⁸⁹Kr, ⁹¹Sr, ⁹³Zr, ⁹⁵Mo, ⁹⁷Ru; calculated levels, J, π, yrast states of N=53 isotones, B(E2), B(M1); discussed j-1 anomaly. Large-scale shell model calculations.

doi: 10.1103/PhysRevC.88.034302