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Near-Yrast spectroscopy of 164Yb and neighbouring nuclei : Systematics of octupole bands and bandcrossings

Jónsson, S. ; Roy, N. ; Ryde, H. LU ; Waluś, W. ; Kownacki, J. ; Garrett, J. D. ; Hagemann, G. B. ; Herskind, B. ; Bengtsson, R. LU and Åberg, S. LU (1986) In Nuclear Physics, Section A 449(3). p.537-578
Abstract

High-spin states in 164Yb have been populated in the 152Sm(16O, 4n) and 150Sm(18O, 4n) reactions. From studies of γγ coincidences, γ-ray angular distributions and conversion electron measurements the level scheme has been constructed. The g-band and the S-band have been established to spin and parity 22+ and 26+', respectively, and the rotational sequences (π, α) = (-, 1)1, (-, 0)1 and (-, 0)2 to 23-, 24- and 18-, respectively. Constructed two-quasineutron configurations and cranked shell model calculations are compared with the experimental results. Residual interactions between quasiparticles... (More)

High-spin states in 164Yb have been populated in the 152Sm(16O, 4n) and 150Sm(18O, 4n) reactions. From studies of γγ coincidences, γ-ray angular distributions and conversion electron measurements the level scheme has been constructed. The g-band and the S-band have been established to spin and parity 22+ and 26+', respectively, and the rotational sequences (π, α) = (-, 1)1, (-, 0)1 and (-, 0)2 to 23-, 24- and 18-, respectively. Constructed two-quasineutron configurations and cranked shell model calculations are compared with the experimental results. Residual interactions between quasiparticles are extracted from data. The side-bands in 162, 164Er and 164, 166Yb are discussed, putting a special emphasis on the octupole bands and their interaction with the two-quasiparticle bands. Crossing frequencies and the gain in alignment are summarized for the Yb isotopes and the main features are discussed.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nuclear reactions, Nuclear structure
in
Nuclear Physics, Section A
volume
449
issue
3
pages
42 pages
publisher
Elsevier
external identifiers
  • scopus:0002256624
ISSN
0375-9474
DOI
10.1016/0375-9474(86)90234-4
language
English
LU publication?
yes
id
389c199a-7493-48eb-8cc0-9ea30c4745f7
date added to LUP
2025-09-02 14:50:05
date last changed
2025-10-14 13:29:49
@article{389c199a-7493-48eb-8cc0-9ea30c4745f7,
  abstract     = {{<p>High-spin states in <sup>164</sup>Yb have been populated in the <sup>152</sup>Sm(<sup>16</sup>O, 4n) and <sup>150</sup>Sm(<sup>18</sup>O, 4n) reactions. From studies of γγ coincidences, γ-ray angular distributions and conversion electron measurements the level scheme has been constructed. The g-band and the S-band have been established to spin and parity 22<sup>+</sup> and 26<sup>+'</sup>, respectively, and the rotational sequences (π, α) = (-, 1)<sub>1</sub>, (-, 0)<sub>1</sub> and (-, 0)<sub>2</sub> to 23<sup>-</sup>, 24<sup>-</sup> and 18<sup>-</sup>, respectively. Constructed two-quasineutron configurations and cranked shell model calculations are compared with the experimental results. Residual interactions between quasiparticles are extracted from data. The side-bands in <sup>162, 164</sup>Er and <sup>164, 166</sup>Yb are discussed, putting a special emphasis on the octupole bands and their interaction with the two-quasiparticle bands. Crossing frequencies and the gain in alignment are summarized for the Yb isotopes and the main features are discussed.</p>}},
  author       = {{Jónsson, S. and Roy, N. and Ryde, H. and Waluś, W. and Kownacki, J. and Garrett, J. D. and Hagemann, G. B. and Herskind, B. and Bengtsson, R. and Åberg, S.}},
  issn         = {{0375-9474}},
  keywords     = {{Nuclear reactions; Nuclear structure}},
  language     = {{eng}},
  month        = {{02}},
  number       = {{3}},
  pages        = {{537--578}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Physics, Section A}},
  title        = {{Near-Yrast spectroscopy of <sup>164</sup>Yb and neighbouring nuclei : Systematics of octupole bands and bandcrossings}},
  url          = {{http://dx.doi.org/10.1016/0375-9474(86)90234-4}},
  doi          = {{10.1016/0375-9474(86)90234-4}},
  volume       = {{449}},
  year         = {{1986}},
}