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The coexistence of the intruder vi13/2, superdeformed and terminating bands in the A ∼ 135 mass region

Afanasjev, A. V. and Ragnarsson, I. LU (1996) In Nuclear Physics A 608(2). p.176-201
Abstract

The configuration-dependent shell-correction approach with the cranked Nilsson potential is employed for a systematic investigation of the high-spin spectra of the nuclei in the A ∼ 135 (Z = 57-61, N = 72-78) mass region, where superdeformed bands have been observed. Main attention is paid to the coexistence of intruder νi13/2, superdeformed and terminating bands in the yrast region. Recent developments of the formalism allow the identification of the high-j orbitals in each N-shell, for example, the g9/2 orbitals in the N = 4 shell, after the diagonalization of the cranked Nilsson potential. This turns out to be quite important for the understanding of the high collectivity of the observed bands. It is shown that... (More)

The configuration-dependent shell-correction approach with the cranked Nilsson potential is employed for a systematic investigation of the high-spin spectra of the nuclei in the A ∼ 135 (Z = 57-61, N = 72-78) mass region, where superdeformed bands have been observed. Main attention is paid to the coexistence of intruder νi13/2, superdeformed and terminating bands in the yrast region. Recent developments of the formalism allow the identification of the high-j orbitals in each N-shell, for example, the g9/2 orbitals in the N = 4 shell, after the diagonalization of the cranked Nilsson potential. This turns out to be quite important for the understanding of the high collectivity of the observed bands. It is shown that the equilibrium deformation of the superdeformed bands is strongly dependent on the number of the proton holes in the g9/2 orbitals. With increasing neutron number above N = 75, the intruder νi13/2 bands are calculated triaxial. Especially for Z = 57, but also for higher proton numbers, we calculate some coexistent oblate non-collective states which are yrast for specific spin values at I ≥ 40h.

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type
Contribution to journal
publication status
published
subject
in
Nuclear Physics A
volume
608
issue
2
pages
26 pages
publisher
Elsevier
external identifiers
  • scopus:0030583457
ISSN
0375-9474
DOI
10.1016/0375-9474(96)00257-6
language
English
LU publication?
yes
id
21c17fbf-3762-4868-accc-b48c40f4fed0
date added to LUP
2023-12-08 11:36:54
date last changed
2023-12-08 11:38:14
@article{21c17fbf-3762-4868-accc-b48c40f4fed0,
  abstract     = {{<p>The configuration-dependent shell-correction approach with the cranked Nilsson potential is employed for a systematic investigation of the high-spin spectra of the nuclei in the A ∼ 135 (Z = 57-61, N = 72-78) mass region, where superdeformed bands have been observed. Main attention is paid to the coexistence of intruder νi<sub>13/2</sub>, superdeformed and terminating bands in the yrast region. Recent developments of the formalism allow the identification of the high-j orbitals in each N-shell, for example, the g<sub>9/2</sub> orbitals in the N = 4 shell, after the diagonalization of the cranked Nilsson potential. This turns out to be quite important for the understanding of the high collectivity of the observed bands. It is shown that the equilibrium deformation of the superdeformed bands is strongly dependent on the number of the proton holes in the g<sub>9/2</sub> orbitals. With increasing neutron number above N = 75, the intruder νi<sub>13/2</sub> bands are calculated triaxial. Especially for Z = 57, but also for higher proton numbers, we calculate some coexistent oblate non-collective states which are yrast for specific spin values at I ≥ 40h.</p>}},
  author       = {{Afanasjev, A. V. and Ragnarsson, I.}},
  issn         = {{0375-9474}},
  language     = {{eng}},
  month        = {{10}},
  number       = {{2}},
  pages        = {{176--201}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Physics A}},
  title        = {{The coexistence of the intruder vi<sub>13/2</sub>, superdeformed and terminating bands in the A ∼ 135 mass region}},
  url          = {{http://dx.doi.org/10.1016/0375-9474(96)00257-6}},
  doi          = {{10.1016/0375-9474(96)00257-6}},
  volume       = {{608}},
  year         = {{1996}},
}