Collective backbending effect in the interacting boson model

Abstract

A collective contribution to backbending at high spin states in the interacting boson model (IBM) is found. The condition for the collective backbending in the IBM is the existence of an attractive force between the d bosons and the finiteness of the boson number. An application to {sup 136}Nd is presented. {copyright} {ital 1997} {ital The American Physical Society}