Phys.Rev.Lett. 130, 122502 (2023)

M.Rocchini, P.E.Garrett, M.Zielinska, S.M.Lenzi, D.D.Dao, F.Nowacki, V.Bildstein, A.D.MacLean, B.Olaizola, Z.T.Ahmed, C.Andreoiu, A.Babu, G.C.Ball, S.S.Bhattacharjee, H.Bidaman, C.Cheng, R.Coleman, I.Dillmann, A.B.Garnsworthy, S.Gillespie, C.J.Griffin, G.F.Grinyer, G.Hackman, M.Hanley, A.Illana, S.Jones, A.T.Laffoley, K.G.Leach, R.S.Lubna, J.McAfee, C.Natzke, S.Pannu, C.Paxman, C.Porzio, A.J.Radich, M.M.Rajabali, F.Sarazin, K.Schwarz, S.Shadrick, S.Sharma, J.Suh, C.E.Svensson, D.Yates, T.Zidar

First Evidence of Axial Shape Asymmetry and Configuration Coexistence in ⁷⁴Zn: Suggestion for a Northern Extension of the N=40 Island of Inversion

RADIOACTIVITY ⁷⁴Cu(β^-) [from Ta(p, X)⁷⁴Cu, E=490 MeV]; measured decay products, Eγ, Iγ; deduced γ-ray energies and relative intensities, energy levels, J, π, relative B(E2), ground state enhanced axial shape asymmetry (triaxiality). Comparison with available data, with shell-model calculations (SM) and shell-model calculations in a deformed Hartree-Fock basis (DNO-SM). The GRIFFIN γ-ray spectrometer, TRIUMF-ISAC1 facility.

doi: 10.1103/PhysRevLett.130.122502