Competing proton and neutron rotational alignments: Band structures in Ba131

R. Ma, Yun Liang, E. S. Paul, N. Xu, D. B. Fossan, L. Hildingsson, R. A. Wyss

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

High-spin states in the odd-neutron Ba131 nucleus have been populated following the Sn122(13C,4n) reaction. Several rotational bands were established using - coincidence techniques. The yrast band, built on a h11/2 orbital, has a relatively large signature splitting (160 keV). Cranking calculations suggest a significant triaxial shape with 0°for this configuration. A pair of h11/2 protons align at a rotational frequency Latin small letter h with stroke0.43 MeV and drive the nucleus towards a near-prolate shape (0°), which is manifest by the observation of a I=1 band with strong dipole transitions and a small signature inversion. At a similar frequency, pairs of h11/2 neutrons align and drive the nucleus to near-oblate (-60°) shapes, resulting in the observation of decoupled I=2 bands.

Original languageEnglish (US)
Pages (from-to)717-729
Number of pages13
JournalPhysical Review C
Volume41
Issue number2
DOIs
StatePublished - 1990
Externally publishedYes

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alignment
neutrons
protons
nuclei
signatures
inversions
dipoles
orbitals
configurations

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Ma, R., Liang, Y., Paul, E. S., Xu, N., Fossan, D. B., Hildingsson, L., & Wyss, R. A. (1990). Competing proton and neutron rotational alignments: Band structures in Ba131. Physical Review C, 41(2), 717-729. https://doi.org/10.1103/PhysRevC.41.717

Competing proton and neutron rotational alignments : Band structures in Ba131. / Ma, R.; Liang, Yun; Paul, E. S.; Xu, N.; Fossan, D. B.; Hildingsson, L.; Wyss, R. A.

In: Physical Review C, Vol. 41, No. 2, 1990, p. 717-729.

Research output: Contribution to journalArticle

Ma, R, Liang, Y, Paul, ES, Xu, N, Fossan, DB, Hildingsson, L & Wyss, RA 1990, 'Competing proton and neutron rotational alignments: Band structures in Ba131', Physical Review C, vol. 41, no. 2, pp. 717-729. https://doi.org/10.1103/PhysRevC.41.717
Ma, R. ; Liang, Yun ; Paul, E. S. ; Xu, N. ; Fossan, D. B. ; Hildingsson, L. ; Wyss, R. A. / Competing proton and neutron rotational alignments : Band structures in Ba131. In: Physical Review C. 1990 ; Vol. 41, No. 2. pp. 717-729.
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