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Deformation in odd-mass nuclei near A ∼ 100 : one- and three-quasiparticle nilsson states in 9939Y60

Meyer, R. A. ; Monnand, E. ; Pinston, J. A. ; Schussler, F. ; Ragnarsson, I. LU ; Pfeiffer, B. ; Lawin, H. ; Lhersonneau, G. ; Seo, T. and Sistemich, K. (1985) In Nuclear Physics, Section A 439(3). p.510-534
Abstract

The deexcitation of the 8.6 μs isomer of 9939Y has been studied using γ-ray spectroscopy techniques at LOHENGRIN and JOSEF. The resultant level scheme is analyzed within the ' framework of the particle-rotor coupling model. The ground-state band, to spin 19 2u+, is found to have band properties consistent with a π[422 5 2] Nilsson assignment. The 8.6 μs isomer and a side band with a band-head half-life of 1.4 ns are found to have Jπ values of 17 2+ and 11 2+, respectively. Their properties are consistent with a {π[422 5 2]ν[411 3 2]ν[404 9 2]} assignment. Some evidence is given for the dominance of the νν interaction over the πν interaction in these three-quasiparticle... (More)

The deexcitation of the 8.6 μs isomer of 9939Y has been studied using γ-ray spectroscopy techniques at LOHENGRIN and JOSEF. The resultant level scheme is analyzed within the ' framework of the particle-rotor coupling model. The ground-state band, to spin 19 2u+, is found to have band properties consistent with a π[422 5 2] Nilsson assignment. The 8.6 μs isomer and a side band with a band-head half-life of 1.4 ns are found to have Jπ values of 17 2+ and 11 2+, respectively. Their properties are consistent with a {π[422 5 2]ν[411 3 2]ν[404 9 2]} assignment. Some evidence is given for the dominance of the νν interaction over the πν interaction in these three-quasiparticle partners.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nuclear Physics, Section A
volume
439
issue
3
pages
25 pages
publisher
Elsevier
external identifiers
  • scopus:0000992328
ISSN
0375-9474
DOI
10.1016/0375-9474(85)90424-5
language
English
LU publication?
yes
id
f6cd8798-63d5-4000-bb7d-9276d4cb209e
date added to LUP
2026-01-15 11:17:06
date last changed
2026-01-23 13:22:32
@article{f6cd8798-63d5-4000-bb7d-9276d4cb209e,
  abstract     = {{<p>The deexcitation of the 8.6 μs isomer of <sup>99</sup><sub>39</sub>Y has been studied using γ-ray spectroscopy techniques at LOHENGRIN and JOSEF. The resultant level scheme is analyzed within the ' framework of the particle-rotor coupling model. The ground-state band, to spin 19 2<sup>u+</sup>, is found to have band properties consistent with a π[422 5 2] Nilsson assignment. The 8.6 μs isomer and a side band with a band-head half-life of 1.4 ns are found to have J<sup>π</sup> values of 17 2<sup>+</sup> and 11 2<sup>+</sup>, respectively. Their properties are consistent with a {π[422 5 2]ν[411 3 2]ν[404 9 2]} assignment. Some evidence is given for the dominance of the νν interaction over the πν interaction in these three-quasiparticle partners.</p>}},
  author       = {{Meyer, R. A. and Monnand, E. and Pinston, J. A. and Schussler, F. and Ragnarsson, I. and Pfeiffer, B. and Lawin, H. and Lhersonneau, G. and Seo, T. and Sistemich, K.}},
  issn         = {{0375-9474}},
  language     = {{eng}},
  month        = {{06}},
  number       = {{3}},
  pages        = {{510--534}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Physics, Section A}},
  title        = {{Deformation in odd-mass nuclei near A ∼ 100 : one- and three-quasiparticle nilsson states in <sup>99</sup><sub>39</sub>Y<sub>60</sub>}},
  url          = {{http://dx.doi.org/10.1016/0375-9474(85)90424-5}},
  doi          = {{10.1016/0375-9474(85)90424-5}},
  volume       = {{439}},
  year         = {{1985}},
}