Phys.Rev. C 96, 044320 (2017)

F.Didierjean, D.Verney, G.Duchene, J.Litzinger, K.Sieja, A.Dewald, A.Goasduff, R.Lozeva, C.Fransen, G.de Angelis, S.Aydin, D.Bazzacco, A.Bracco, S.Bottoni, L.Corradi, F.Crespi, E.Ellinger, E.Farnea, E.Fioretto, S.Franchoo, A.Gottardo, L.Grocutt, M.Hackstein, F.Ibrahim, K.Kolos, S.Leoni, S.Lenzi, S.Lunardi, R.Menegazzo, D.Mengoni, C.Michelagnoli, T.Mijatovic, V.Modamio, O.Moller, G.Montagnoli, D.Montanari, A.I.Morales, D.Napoli, M.Niikura, F.Recchia, E.Sahin, F.Scarlassara, L.Sengele, S.Szilner, J.F.Smith, A.M.Stefanini, C.Ur, J.J.Valiente-Dobon, V.Vandone

Neutron effective single-particle energies above ⁷⁸Ni: A hint from lifetime measurements in the N=51 isotones ⁸⁵Se and ⁸⁷Kr

NUCLEAR REACTIONS ²³⁸U(⁸²Se, ⁸⁵Se), (⁸²Se, ⁸⁷Kr), E=530 MeV; measured Eγ, Iγ, particle spectra, (⁸⁷Kr)γ-coin, (⁸²Se)γ-coin, level half-lives by recoil-distance Doppler-shift (RDDS) method using Prisma spectrometer for particle detection, AGATA demonstrator array for γ detection, and Cologne plunger device for half-life measurements at LNL, Legnaro tandem-ALPI facility. ⁸⁷Kr, ⁸⁵Se; deduced levels, J, π, configurations. Comparison with core-coupled model and shell model calculations. ²³⁸U(⁸²Se, X)⁷⁹Se/⁸⁰Se/⁸¹Se/⁸²Se/⁸³Se/⁸⁴Se/⁸⁵Se/⁸⁶Se/⁸⁰Kr/⁸¹Kr/⁸²Kr/⁸³Kr/⁸⁴Kr/⁸⁵Kr/⁸⁶Kr/⁸⁷Kr/⁸⁸Kr/⁸⁹Kr/⁹⁰Kr/⁹¹Kr/⁹²Kr/⁹³Kr, E=530 MeV; measured isotopic yields. Systematics of energies of 5/2+ ground states, 1/2+, 7/2+ and 9/2+ states in N=51 isotones ⁸³Ge, ⁸⁵Se, ⁸⁷Kr, ⁸⁹Sr, ⁹¹Zr, ⁹³Mo.

doi: 10.1103/PhysRevC.96.044320