2023

Auranen, K.; Siwach, P.; Arumugam, P.; Briscoe, A. D.; Ferreira, L. S.; Grahn, T.; Greenlees, P. T.; Herzáň, A.; Illana, A.; Joss, D. T.; Joukainen, H.; Julin, R.; Jutila, H.; Leino, M.; Louko, J.; Luoma, M.; Maglione, E.; Ojala, J.; Page, R. D.; Pakarinen, J.; Rahkila, P.; Romero, J.; Ruotsalainen, P.; Sandzelius, M.; Sarén, J.; Tolosa-Delgado, A.; Uusitalo, J.; Zimba, G.

Two triaxial states of the proton-decaying nucleus 147Tm were studied via a comparison of experimental data to results obtained through nonadiabatic quasiparticle calculations. The experimental data were collected in a recoil-decay tagging study using the vacuum-mode recoil separator MARA coupled with the JUROGAM3 γ-ray spectrometer. The previously proposed level scheme above the triaxial 11/2− (πh11/2) ground state was confirmed, and the level structure was expanded to cover the states above the weakly populated proton-emitting 5/2+ (πd5/2) isomeric state. It was found that the isomeric state is also triaxial, and possibly more deformed than the ground state.