Collective bands in I-125

An in-beam gamma-ray spectroscopic study of the nuclear structure of I-125 has led to extensions and alterations of the level scheme of this nucleus. Several new intraband and interband transitions are observed in the positiv e parity bands based on pi d(5/2) and pi g(7/2) configurations, indicating mixing of the two configurations in these bands. The strongly coupled pi g( 9/2) band has also been extended and characteristic quadrupole crossover tr ansitions, hitherto unreported, have been observed, providing estimates of the B(M1;I-->I-1)/B(E2;I-->I -2) ratios fdr transitions in this band. New e xperimental results are presented concerning the three-quasiparticle struct ure and likely members of the unfavored signature of the prolate pi h(11/2) band, showing excellent agreement with the theoretical results. Experiment al results are discussed in relation to the systematics of the neighboring odd-A nuclei. [S0556-2813(99)07605-0].