Transition from Spherical to Deformed Shapes of Nuclei in the Monte Carlo Shell Model
Abstract
The transition from spherical to deformed shapes is studied in terms of largescale shellmodel calculations for Ba isotopes as a function of valence nucleon number with fixed singleparticle space and Hamiltonian. A new version of the Monte Carlo shell model is introduced so as to incorporate pairing correlations efficiently, by utilizing condensed pair bases. The energy levels and electromagnetic matrix elements are described in agreement with experiments throughout the transitional region. The orbital M1 sum rule is calculated as a measure of the deformation evolution, and the Qphonon picture is shown to be reasonable from spherical to deformed nuclei.
 Publication:

Physical Review Letters
 Pub Date:
 February 2001
 DOI:
 10.1103/PhysRevLett.86.1171
 Bibcode:
 2001PhRvL..86.1171S