Microscopic aspects of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> softness in atomic nuclei

Abstract

One of the main research themes in quantum many-body systems is the emergence of collective features from microscopic degrees of freedom. Using the microscopic approach of the triaxial projected shell model, the authors demonstrate that admixing a few quasiparticle excitations into the vacuum configuration with a fixed triaxiality parameter $\ensuremath{\gamma}$ provides a quantitative description of the shape fluctuations of the $\ensuremath{\gamma}$-soft nucleus ${}^{104}$Ru. The collective features are elucidated using the quadrupole shape invariant analysis, and also the staggering phase classification of the $\ensuremath{\gamma}$ band.

Topics & Concepts