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

CD O'Leary, CE Svensson, SG Frauendorf, AV Afanasjev, DE Appelbe, RAE Austin, GC Ball, JA Cameron, RM Clark, M Cromaz, P Fallon, DF Hodgson, NS Kelsall, AO Macchiavelli, Ingemar Ragnarsson, D Sarantites, JC Waddington, R Wadsworth

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Abstract

High-spin states in the odd-odd N=Z nucleus Rb-74(37)37 were studied using the Ca-40(Ca-40,alphanp) reaction. A previously observed odd-spin T=0 band has been extended to I-pi=(31(+)) and an even-spin T=0 band has been observed for the first time to I-pi=(22(+)); both have a pi(g(9/2))circle timesnu(g(9/2)) structure. A strongly coupled low-spin T=0,K=3 band has been interpreted as being based upon a pi[312]3/2 circle timesnu[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.
Original languageEnglish
JournalPhysical Review C (Nuclear Physics)
Volume67
Issue number2: 021301
DOIs
Publication statusPublished - 2003

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)

Subject classification (UKÄ)

  • Physical Sciences

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