We use a cranked shell model Monte Carlo (SMMC) approach to study rotational properties and pair correlations in the odd-odd N = Z nucleus 74Rb. The calculation is performed in the complete 1p-0f5/2-0g9/2 model space with a residual interaction derived from the Paris potential. The calculated ground state is dominated by isovector J = 0 proton-neutron (pn) pairing. With increasing frequency the J = 0 pn correlations decrease to a constant value at around 〈J〉 = 3 ± 1.5(latin small letter h with stroke), while the isoscalar pn correlations (mainly J = 9) increase. Relatedly, the isospin decreases with frequency from its ground state value T = 1 as isoscalar correlations set in. This finding is in agreement with experiment, where at higher rotational frequency a T = 0 band becomes energetically favored over the T = 1 ground state band.
|Original language||English (US)|
|Number of pages||7|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|State||Published - Apr 24 1997|
ASJC Scopus subject areas
- Nuclear and High Energy Physics