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Band structures and proton-neutron interactions in 174Ta

Bark, R. A. ; Carlsson, H. ; Freeman, S. J. ; Hagemann, G. B. ; Ingebretsen, F. ; Jensen, H. J. ; Lönnroth, T. ; Piiparinen, M. J. ; Ragnarsson, I. LU and Ryde, H. LU , et al. (1998) In Nuclear Physics A 630(3-4). p.603-630
Abstract

Six rotational bands in the odd-odd nucleus 174Ta have been populated with the 160Gd(19F,5n) reaction. High-spin states were identified using the NORDBALL array. Both signatures of the doubly decoupled π1/2- [541 ] ⊗ v1/2- [521] band and semi-decoupled π1/2- [541] ⊗ v7/2+ [633] band are observed, in addition to the high-K couplings of the π9/2- [514] ⊗ v7/2+ [633], π9/2- [514] ⊗ v5/2- [512], π7/2+ [404] ⊗v7/2+ [633], and π5/2+ [402] ⊗ v5/2- [512] configurations. The signature splitting of the π1/2- [541] ⊗ v7/2+ [633] band is inverted from the expected... (More)

Six rotational bands in the odd-odd nucleus 174Ta have been populated with the 160Gd(19F,5n) reaction. High-spin states were identified using the NORDBALL array. Both signatures of the doubly decoupled π1/2- [541 ] ⊗ v1/2- [521] band and semi-decoupled π1/2- [541] ⊗ v7/2+ [633] band are observed, in addition to the high-K couplings of the π9/2- [514] ⊗ v7/2+ [633], π9/2- [514] ⊗ v5/2- [512], π7/2+ [404] ⊗v7/2+ [633], and π5/2+ [402] ⊗ v5/2- [512] configurations. The signature splitting of the π1/2- [541] ⊗ v7/2+ [633] band is inverted from the expected splitting, and this is interpreted as being due to a residual proton-neutron interaction. It is shown empirically that this interaction, together with deformation changes, can account for the increased crossing frequency associated with the alignment of i13/2 neutrons in the π1/2- [541] bands of odd-Z nuclei.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
measured Eγ, Iγ, γγ -coin, Nuclear reactions Gd(F, 5n), E = 103, 105 Mev
in
Nuclear Physics A
volume
630
issue
3-4
pages
28 pages
publisher
Elsevier
external identifiers
  • scopus:0032559468
ISSN
0375-9474
DOI
10.1016/S0375-9474(97)00650-7
language
English
LU publication?
yes
id
ac6cc509-c06a-452c-a92e-619830723733
date added to LUP
2026-01-15 10:28:34
date last changed
2026-02-06 14:50:03
@article{ac6cc509-c06a-452c-a92e-619830723733,
  abstract     = {{<p>Six rotational bands in the odd-odd nucleus <sup>174</sup>Ta have been populated with the <sup>160</sup>Gd(<sup>19</sup>F,5n) reaction. High-spin states were identified using the NORDBALL array. Both signatures of the doubly decoupled π1/2<sup>-</sup> [541 ] ⊗ v1/2<sup>-</sup> [521] band and semi-decoupled π1/2<sup>-</sup> [541] ⊗ v7/2<sup>+</sup> [633] band are observed, in addition to the high-K couplings of the π9/2<sup>-</sup> [514] ⊗ v7/2<sup>+</sup> [633], π9/2<sup>-</sup> [514] ⊗ v5/2<sup>-</sup> [512], π7/2<sup>+</sup> [404] ⊗v7/2<sup>+</sup> [633], and π5/2<sup>+</sup> [402] ⊗ v5/2<sup>-</sup> [512] configurations. The signature splitting of the π1/2<sup>-</sup> [541] ⊗ v7/2<sup>+</sup> [633] band is inverted from the expected splitting, and this is interpreted as being due to a residual proton-neutron interaction. It is shown empirically that this interaction, together with deformation changes, can account for the increased crossing frequency associated with the alignment of i<sub>13/2</sub> neutrons in the π1/2<sup>-</sup> [541] bands of odd-Z nuclei.</p>}},
  author       = {{Bark, R. A. and Carlsson, H. and Freeman, S. J. and Hagemann, G. B. and Ingebretsen, F. and Jensen, H. J. and Lönnroth, T. and Piiparinen, M. J. and Ragnarsson, I. and Ryde, H. and Schnack-Petersen, H. and Semmes, P. B. and Tjøm, P. O.}},
  issn         = {{0375-9474}},
  keywords     = {{measured Eγ, Iγ, γγ -coin; Nuclear reactions Gd(F, 5n), E = 103, 105 Mev}},
  language     = {{eng}},
  month        = {{02}},
  number       = {{3-4}},
  pages        = {{603--630}},
  publisher    = {{Elsevier}},
  series       = {{Nuclear Physics A}},
  title        = {{Band structures and proton-neutron interactions in <sup>174</sup>Ta}},
  url          = {{http://dx.doi.org/10.1016/S0375-9474(97)00650-7}},
  doi          = {{10.1016/S0375-9474(97)00650-7}},
  volume       = {{630}},
  year         = {{1998}},
}