Phys.Rev. C 106, 044311 (2022)

U.Silwal, J.A.Winger, S.V.Ilyushkin, K.P.Rykaczewski, C.J.Gross, J.C.Batchelder, L.Cartegni, I.G.Darby, R.Grzywacz, A.Korgul, W.Królas, S.N.Liddick, C.Mazzocchi, A.J.Mendez, II, S.Padgett, M.M.Rajabali, D.P.Siwakoti, D.Shapira, D.W.Stracener, E.F.Zganjar

β decay of neutron-rich ⁷⁶Cu and the structure of ⁷⁶Zn

RADIOACTIVITY ⁷⁶Cu(β^-), (β^-n)[from U(p, F), E=54 MeV using UC_x target, followed by isobaric separation of fission fragments]; measured Eγ, Iγ, Eβ, βγ-coin, γγ-coin, T_1/2 of ⁷⁶Cu decay using four HPGe clover detectors at the LeRIBSS-HRIFL-ORNL facility. ⁷⁶Zn; deduced levels, J, π, β feedings, logft. ⁷⁶Cu; deduced T_1/2 of g.s. decay, no evidence for an isomeric activity proposed earlier, and no γ rays detected in ⁷⁵Zn from β^-n decay of ⁷⁶Cu. Comparison with previous experimental results, and with NUSHELLX shell-model calculations. Systematics of first excited 0+, 2+ and 4+ levels, and second 2+ in ^{66,68,70,72,74,76,78,80}Zn.

NUCLEAR STRUCTURE ⁷⁶Zn; calculated levels, J, π, B(M1), B(E2), relative γ intensities from low-lying and low-spin levels, β feedings using NUSHELLX with the jj44 model space and the JUN45 effective interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.106.044311