Triaxiality in 48Cr

Rotational behavior inducing triaxiality is discussed for Cr-48 in the cranked Nilsson-Strutinsky (CNS) model, as well as in the spherical shelf model. It is shown that the tow-spin region up to about I - 8, has a prolate well-deformed shape. At higher spins the shape is triaxial with a negative-gamma 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 shelf model results and experimental data, the triaxial rotation around the intermediate axis is confirmed. (C) 2000 Published by Elsevier Science B.V. All rights reserved.