Energy staggering parameters in nuclear magnetic rotational bands *

Abstract

Abstract This study presents the systematics of energy staggering for magnetic rotational bands with and transition properties, which are strictly consistent with the features of good candidates of magnetic rotational bands in the , 110, 130, and 190 mass regions. The regularities exhibited by these bands with respect to the staggering parameter, which increases with increasing spin, are in agreement with the semiclassical description of shears mechanism. Moreover, the abnormal behaviour in the backbend regions or close to band termination has also been discussed. Taking the magnetic dipole bands with same configuration in three isotones, i.e., , , and , as examples, the transition from chiral to magnetic rotation with the proton number approaching is presented. Moreover, the self-consistent tilted axis and principle axis cranking relativistic mean-field theories are applied to investigate the rotational mechanism in the dipole band of .