6533b7d4fe1ef96bd126309f
RESEARCH PRODUCT
Evidence for isovector neutron-proton pairing from high-spin states inN=Z74Rb
N. S. KelsallM. CromazC. D. O’learyR. M. ClarkR. WadsworthG. C. BallA. O. MacchiavelliP. FallonA. V. AfanasjevA. V. AfanasjevA. V. AfanasjevC. E. SvenssonD. E. AppelbeJ. A. CameronIngemar RagnarssonD. G. SarantitesJ. C. WaddingtonD. F. HodgsonRae AustinS. Frauendorfsubject
PhysicsNuclear and High Energy PhysicsIsovectorProtonSpin statesField (physics)IsospinPairingNuclear TheoryNeutronAtomic physicsSymmetry (physics)description
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. (Less)
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-02-28 | Physical Review C |