Phys.Rev. C 104, 054305 (2021)

B.M.Nyako, J.Timar, M.Csatlos, Zs.Dombradi, A.J.Krasznahorkay, I.Kuti, D.Sohler, T.G.Tornyi, M.Czerwinski, T.Rzaca-Urban, W.Urban, L.Atanasova, D.L.Balabanski, K.Sieja, A.Blanc, G.de France, M.Jentschel, U.Koster, P.Mutti, G.S.Simpson, T.Soldner, C.A.Ur

Observation of excited states in the neutron-rich nucleus ⁸⁹Br

NUCLEAR REACTIONS ²³⁵U(n, F), E=cold neutrons; measured Eγ, Iγ, γγ-coin, (γ rays from complementary fission fragments ^144,145La)γγ-coin, using EXILL array of Ge detectors at the PF1B facility of ILL-Grenoble. ⁸⁹Br; deduced high-spin levels, J, π, g_9/2 band, γ-ray branching ratios for one level, configurations, evolution of collectivity in this mass region. Comparison with large valence-space shell-model calculations, and with experimental levelstructure in ⁸⁷Br investigated by 2021Ny01: Phys. Rev. C 103, 034304. ^144,145La; observed γ rays.

doi: 10.1103/PhysRevC.104.054305