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Evidence for isovector neutron-proton pairing from high-spin states in N = Z 74Rb

O'Leary, C. D. ; Svensson, C. E. ; Frauendorf, S. G. ; Afanasjev, A. V. ; Appelbe, D. E. ; Austin, R. A.E. ; Ball, G. C. ; Cameron, J. A. ; Clark, R. M. and Cromaz, M. , et al. (2003) In Physical Review C - Nuclear Physics 67(2). p.213011-213015
Abstract

High-spin states in the odd-odd N = Z nucleus 3774Rb37 were studied using the 40Ca(40Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to Iπ = (31+) and an even-spin T = 0 band has been observed for the first time to Iπ = (22+); both have a π(g9/2)⊗ν(g9/2) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t = 1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence... (More)

High-spin states in the odd-odd N = Z nucleus 3774Rb37 were studied using the 40Ca(40Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to Iπ = (31+) and an even-spin T = 0 band has been observed for the first time to Iπ = (22+); both have a π(g9/2)⊗ν(g9/2) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t = 1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence for the existence of an isovector pair field that contains a neutron-proton component with the proper strength for ensuring isospin conservation.

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type
Contribution to journal
publication status
published
subject
in
Physical Review C - Nuclear Physics
volume
67
issue
2
article number
021301
pages
5 pages
publisher
American Physical Society
external identifiers
  • scopus:0037316567
ISSN
0556-2813
language
English
LU publication?
yes
id
3313dbfd-2dce-4f9a-81c4-ba40ffb4b587
date added to LUP
2024-01-19 09:22:25
date last changed
2024-01-19 09:23:17
@article{3313dbfd-2dce-4f9a-81c4-ba40ffb4b587,
  abstract     = {{<p>High-spin states in the odd-odd N = Z nucleus <sub>37</sub><sup>74</sup>Rb<sub>37</sub> were studied using the <sup>40</sup>Ca(<sup>40</sup>Ca,αnp) reaction. A previously observed odd-spin T = 0 band has been extended to I<sup>π</sup> = (31<sup>+</sup>) and an even-spin T = 0 band has been observed for the first time to I<sup>π</sup> = (22<sup>+</sup>); both have a π(g<sub>9/2</sub>)⊗ν(g<sub>9/2</sub>) structure. A strongly coupled low-spin T = 0, K = 3 band has been interpreted as being based upon a π[312]3/2 ⊗ ν[312]3/2 configuration. Cranked relativistic Hartree-Bogoliubov calculations, which are corrected for the t = 1 np-pair field by restoring isospin symmetry, reproduce the observed spectrum. These new results provide evidence for the existence of an isovector pair field that contains a neutron-proton component with the proper strength for ensuring isospin conservation.</p>}},
  author       = {{O'Leary, C. D. and Svensson, C. E. and Frauendorf, S. G. and Afanasjev, A. V. and Appelbe, D. E. and Austin, R. A.E. and Ball, G. C. and Cameron, J. A. and Clark, R. M. and Cromaz, M. and Fallen, P. and Hodgson, D. F. and Kelsall, N. S. and Macchiavelli, A. O. and Ragnarsson, I. and Sarantites, D. and Waddington, J. C. and Wadsworth, R.}},
  issn         = {{0556-2813}},
  language     = {{eng}},
  month        = {{02}},
  number       = {{2}},
  pages        = {{213011--213015}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C - Nuclear Physics}},
  title        = {{Evidence for isovector neutron-proton pairing from high-spin states in N = Z <sup>74</sup>Rb}},
  volume       = {{67}},
  year         = {{2003}},
}