Identical energy bands of uranium isotopes in the interacting boson model

Abstract

The energy spectra and B(E2) values of the uranium isotopes U are calculated in the interacting-boson-plus-fermion-pair model. It was found that in order to reproduce the identical energy bands, weak boson pairing, a weak angular momentum interaction and a strong quadrupole interaction are needed.PACS number(s): 21.60. Fw, 27.90.+b Recently superdeformed rotational bands with almost identical energies have been discovered in the mass 150 and 190 regions [1 -4]. The occurrences of identical energy bands which suggest a constant moment of inertia are not expected &om general arguments. The A /3 mass dependence, the changes of deformation with mass, the orbital alignment effects, and changes in pairing all seem

Identical Bands in Deformed and Superdeformed Nuclei

“…Identical ground-state bands in the uranium isotopes (5) were discussed in Reference (130) in the framework of IBFM, involving proton 1i 1 3/ 2 and neutron…”