Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Nuclear core-quasiparticle coupling

Larsson, S. E. LU ; Leander, G. and Ragnarsson, I. LU (1978) In Nuclear Physics, Section A 307(2). p.189-223
Abstract

Relations between different core-particle coupling models based on the Bohr Hamiltonian are discussed, and in particular the γ-unstable and rigid 30° triaxial cores are compared quantitatively. A new formulation is developed employing a rigid triaxial rotor core and the strong-coupling basis. Within the limitations imposed by this model core, it is equally applicable in the limits of small and extremely large deformations. Sample calculations are made for the nuclei 185Re and 75, 77Se. The results for the latter support earlier predictions of an oblate-prolate shape transition in this region of nuclei, but also indicate difficulties in the treatment of pairing. As another application, the wave functions and... (More)

Relations between different core-particle coupling models based on the Bohr Hamiltonian are discussed, and in particular the γ-unstable and rigid 30° triaxial cores are compared quantitatively. A new formulation is developed employing a rigid triaxial rotor core and the strong-coupling basis. Within the limitations imposed by this model core, it is equally applicable in the limits of small and extremely large deformations. Sample calculations are made for the nuclei 185Re and 75, 77Se. The results for the latter support earlier predictions of an oblate-prolate shape transition in this region of nuclei, but also indicate difficulties in the treatment of pairing. As another application, the wave functions and excitation energies of decoupled states are illuminated from the point of view of the strong-coupling basis, and the effects of hexadecapole deformation and j-mixing are examined.

(Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Physics, Section A
volume
307
issue
2
pages
35 pages
publisher
Elsevier
external identifiers
  • scopus:11144264761
ISSN
0375-9474
DOI
10.1016/0375-9474(78)90613-9
language
English
LU publication?
yes
id
cc48a0c8-76c2-432c-8950-e7b99cfbbc76
date added to LUP
2026-01-15 09:54:42
date last changed
2026-01-20 10:01:53
@article{cc48a0c8-76c2-432c-8950-e7b99cfbbc76,
  abstract     = {{<p>Relations between different core-particle coupling models based on the Bohr Hamiltonian are discussed, and in particular the γ-unstable and rigid 30° triaxial cores are compared quantitatively. A new formulation is developed employing a rigid triaxial rotor core and the strong-coupling basis. Within the limitations imposed by this model core, it is equally applicable in the limits of small and extremely large deformations. Sample calculations are made for the nuclei <sup>185</sup>Re and <sup>75, 77</sup>Se. The results for the latter support earlier predictions of an oblate-prolate shape transition in this region of nuclei, but also indicate difficulties in the treatment of pairing. As another application, the wave functions and excitation energies of decoupled states are illuminated from the point of view of the strong-coupling basis, and the effects of hexadecapole deformation and j-mixing are examined.</p>}},
  author       = {{Larsson, S. E. and Leander, G. and Ragnarsson, I.}},
  issn         = {{0375-9474}},
  language     = {{eng}},
  month        = {{09}},
  number       = {{2}},
  pages        = {{189--223}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Physics, Section A}},
  title        = {{Nuclear core-quasiparticle coupling}},
  url          = {{http://dx.doi.org/10.1016/0375-9474(78)90613-9}},
  doi          = {{10.1016/0375-9474(78)90613-9}},
  volume       = {{307}},
  year         = {{1978}},
}