Phys.Lett. B 834, 137457 (2022)

L.Zago, A.Gottardo, J.J.Valiente-Dobon, G.Benzoni, A.Gadea, M.Gorska, S.Lunardi, Zs.Podolyak, P.H.Regan, D.Rudolph, A.Algora, G.de Angelis, D.Bazzacco, J.Benlliure, P.Boutachkov, A.Bracco, A.M.Bruce, F.Camera, E.Casarejos, M.L.Cortes, F.C.L.Crespi, A.Corsi, C.Domingo-Pardo, M.Doncel, T.Engert, H.Geissel, J.Gerl, A.Goasduff, N.Goel, J.Grebosz, E.Gregor, T.Habermann, S.Klupp, I.Kojouharov, N.Kurz, S.M.Lenzi, S.Leoni, S.Mandal, R.Menegazzo, D.Mengoni, B.Million, A.I.Morales, D.R.Napoli, F.Naqvi, C.Nociforo, M.Pfutzner, S.Pietri, A.Prochazka, F.Recchia, E.Sahin, H.Schaffner, A.Sharma, B.Sitar, D.Siwal, P.Strmen, I.Szarka, C.A.Ur, P.M.Walker, H.Weick, O.Wieland, H.-J.Wollersheim

High-spin states in ²¹²Po above the α-decaying (18⁺) isomer

NUCLEAR REACTIONS ⁹Be(²³⁸U, X), E=1 GeV/nucleon; measured reaction products, isotope identification matrix, Eγ, Iγ, T_1/2 of isomers by γ(t) using RISING array of 105 Ge detectors and the FRS separator at the GSI UNILAC-SIS18 facility. ²¹²Po; deduced high-spin levels, J, π, T_1/2 of two micro-sec isomers, multipolarity, configuration, transition probabilities. ^204mTl, ^205m,206mPb, ²⁰⁷Bi, ^210m,211mPo; compiled measured isomer ratios from literature, and compared with theoretical predictions from the sharp cut-off model. Comparison with shell-model calculations.

doi: 10.1016/j.physletb.2022.137457