Collective structures up to spin ~ 65ℏin theN= 90 isotones158Er and157Ho

Le résumé fourni par la source

A new collective band with high dynamic moment of inertia in 158 Er at spins beyond band termination has been found in addition to the two previously reported ones. The measured transition quadrupole moments ( Q t ) of these three bands are very similar. These three bands have been suggested to possess a triaxial strongly deformed shape, based on comparisons with calculations using the cranked Nilsson-Strutinsky model and with tilted axis cranking calculations using the Skyrme-Hartree-Fock model. In addition, three collective bands with similar high dynamic moments of inertia, tentatively assigned to 157 Ho, have been observed. Thus, it is suggested that all these structures share a common underlying character and that they are most likely associated with triaxial strongly deformed minima which are predicted to be close to the yrast line at spin 50 – 70 ℏ .

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.