Realistic Two-body Interactions in Many-nucleon Systems: Correlated Motion beyond Single-particle Behavior

Sviratcheva, K.D. ; Draayer, J.P. ; /Louisiana State U. /Iowa State U. /LLNL, Livermore /SLAC

Stanford Linear Accelerator Center

关键词: Particle Interactions Theory-Hep,Hepth;    Energy Spectra;    Isovectors;    Nickel 58;    Copper 58;   

DOI  :  10.2172/885281
RP-ID  :  SLAC-PUB-11903
RP-ID  :  AC02-76SF00515
RP-ID  :  885281

美国|英语

来源: UNT Digital Library

【 摘 要 】

In the framework of the theory of spectral distributions we perform an overall comparison of three modern realistic interactions, CD-Bonn, CD-Bonn+3terms, and GXPF1 in a broad range of nuclei in the upper fp shell and study their ability to account for the development of isovector pairing correlations and collective rotational motion in many-particle nuclear systems. Our findings reveal a close similarity between CD-Bonn and CD-Bonn+3terms, while both interactions possess features different from the ones of GXPF1. The GXPF1 interaction is used to determine the strength parameter of a quadrupole term that augments an isovector-pairing model interaction with Sp(4) dynamical symmetry, which in turn is shown to yield a reasonable agreement with the experimental low-lying energy spectra of {sup 58}Ni and {sup 58}Cu.