Existence of the odd-spin rotation-aligned band and its properties

Abstract

Energy spectra of deformed even nuclei, including both even- and odd-spin levels, are calculated by employing an extended model of particles plus rotors which is suitable to describe rotation alignment. The result shows that a rotation-aligned band is always associated with a sequence of odd-spin levels. These odd-spin levels are connected by strong E2 transitions with ΔI = 2 and constitute a rotational band. They appear in the same energy region as the even-spin rotation-aligned band. Magnetic dipole transitions between an even-spin rotation-aligned band and the associated odd-spin band are predicted to be strong and to have a characteristic behavior. These odd-spin levels are found to be very similar to the ordinary even-spin rotation-aligned band in wave-function structure.