Se p 19 99 Triaxiality in 48 Cr

Rotational behavior inducing triaxiality is discussed for Cr in the cranked NilssonStrutinsky (CNS) model, as well as in the spherical shell model. It is shown that the low-spin region up to about I=8, has a prolate well-deformed shape. At higher spins the shape is triaxial with a “negative-γ” deformation, that is, with rotation around the classically forbidden intermediate axis. By comparing calculated B(E2)-values and spectroscopic quadrupole moments in the CNS with spherical shell model results and experimental data, the triaxial rotation around the intermediate axis is confirmed. PACS: 21.10.G; 21.10.Ky; 21.60.C; 21.60.Cs; 21.60.Ev; 23.20.-g; 27.40.+z