Superdeformed band in the $N = Z+4$ nucleus $^{40}$Ar: A projected shell model analysis
Abstract
It has been debated whether the experimentally-identified superdeformed rotational band in Ar [E. Ideguchi, et al., Phys. Lett. B 686 (2010) 18] has an axially or triaxially deformed shape. Projected shell model calculations with angular-momentum-projection using an axially-deformed basis are performed up to high spins. Our calculated energy levels indicate a perfect collective-rotor behavior for the superdeformed yrast band. However, detailed analysis of the wave functions reveals that the high-spin structure is dominated by mixed 0-, 2-, and 4-quasiparticle configurations. The calculated electric quadrupole transition probabilities reproduce well the known experimental data and suggest a reduced, but still significant, collectivity in the high spin region. The deduced triaxial deformation parameters are small throughout the entire band, suggesting that triaxiality is not very important for this superdeformed band.
Keywords
Cite
@article{arxiv.1508.04055,
title = {Superdeformed band in the $N = Z+4$ nucleus $^{40}$Ar: A projected shell model analysis},
author = {Ying-Chun Yang and Yan-Xin Liu and Yang Sun and Mike Guidry},
journal= {arXiv preprint arXiv:1508.04055},
year = {2015}
}