Level scheme study of Mo 92: Searching for evidence of core excitation

HUANG, Z.; ZHANG, G.X.; ZHANG, G.L.; HU, S.P.; LENZI, S.M.; MENGONI, D.; FERREIRA, J.L.; LV, Y.F.; LU, J.B.; PAES, B.; CARDOZO, E.N.; ZHANG, H.Q.; SUN, H.B.; VALIENTE-DOBÓN, J.J.; TESTOV, D.; GOASDUFF, A.; BAZZACCO, D.; JOHN, P.R.; NAPOLI, D.R.; GALTAROSSA, F.; RECCHIA, F.; ANGELIS, G. DE.; SICILIANO, M.; MENEGAZZO, R.; LUBIAN, J.

Physical Review C

American Physical Society

Año: 2022 vol. 106

2469-9985

Excited states in Mo92 are populated via the Y89(Li6,3n)Mo92 reaction at the tandem of XTU, INFN-LNL. The level scheme of Mo92 is revised and expanded considerably by the γ-γ coincidence measurement. The newly observed level structures are compared with different shell-model calculations performed in various model spaces. The results show that the several high-energy (≈2 MeV) transitions, observed for the first time in the current work, could be a presumable signature of N=50 core-breaking effect. The measured strengths of E1 transitions between the low-lying positive and negative bands indicate an important contribution from Z=28 proton core-excitation.