Rotational states in neutron-deficient Gd139

R. Ma, K. Ahn, Y. Liang, E. S. Paul, N. Xu, D. B. Fossan

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

States have been established in the neutron-deficient Gd139 nucleus for the first time via the Mo92(50Cr,2pn) reaction. Both - and -n coincidence techniques were employed. The yrast band, built on the 1/2h11/2[514](9/2- orbital, shows a signature splitting of 1/4100 keV implying a significant triaxial shape. At a rotational frequency Latin small letter h with stroke1/40.29 MeV a pair of h11/2 quasiprotons align. Associated with this alignment are a decrease in the signature splitting, indicating a near-prolate nuclear shape, and an enhancement of the interband M1 transitions relative to the E2 crossovers, which is consistent with a mixed neutron-proton configuration. In addition, a tentative decoupled band showing the characteristics of a band theoretically expected for the -driving 1/2i13/2 orbital was observed.

Original languageEnglish (US)
Pages (from-to)530-535
Number of pages6
JournalPhysical Review C
Volume39
Issue number2
DOIs
StatePublished - Jan 1 1989
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Ma, R., Ahn, K., Liang, Y., Paul, E. S., Xu, N., & Fossan, D. B. (1989). Rotational states in neutron-deficient Gd139. Physical Review C, 39(2), 530-535. https://doi.org/10.1103/PhysRevC.39.530