Robust occurrence of ∆<i>I</i> = 2 bifurcation in scissors rotational bands*

Abstract Based on the extended projected shell model − a microscopic nuclear many-body theory − our recently published article [Phys. Rev. Lett. 129, 042502 (2022)] found an unexpected phenomenon ( bifurcation) in rotational bands associated with scissors vibrations in . In the present work, we extended the study by systematically changing the model parameters (deformation and strength of the monopole-pairing force) for the calculation. We also calculated additional isotopes and isotones with respect to . In all calculations, we found a similar occurrence of the bifurcation in the results. Thus, we confirmed that the bifurcation behavior of the scissors rotational bands originates from the self-organizing effects of deformed proton and neutron bodies during the scissors motion, independently of the model parameters.