Nuclear g-factor measurements of the 9/2 - and 21/2 - isomeric states in 173 Ta

The nuclear g-factors of the one-quasiparticle isomeric state (9/2){sup -} at 165.8 keV and the three-quasiparticle isomeric state (21/2){sup -} at 1713.2 keV in {sup 173}Ta nuclei have been measured using the time differential perturbed angular distribution technique. The nuclear reaction {sup 165}Ho({sup 12}C, 4n{gamma}){sup 173}Ta was used to populate these isomeric states, and the recoiling {sup 173}Ta nuclei were implanted into a thick tantalum backing in the presence of a 7.04(4) kG external magnetic field. The measured value g((9/2){sup -}) = +0.591(18) shows that the (9/2){sup -} isomeric state is not a pure single-particle state but may have a collective contribution due to the octupole excitation of the core. Based on the measured value g((21/2){sup -}) = + 0.620(15) and multi-quasiparticle calculations, the (21/2){sup -} isomeric state is assigned a mixed configuration: {pi}{sup 3}((9/2){sup -}[514], (7/2){sup +}[404] (5/2){sup +}[402]) (39%) and {pi}{sup 1}((7/2){sup +}[404])(multiply-in-circle sign) {nu}{sup 2}((7/2){sup -}[514], (7/2){sup +}[633]) (61%)