Abstract
The nuclear g-factors of the one-quasiparticle isomeric state 9/2(-) at 165.8 keV and the three-quasiparticle isomeric state 21/2(-) at 1713.2 keV in Ta-173 nuclei have been measured using the time differential perturbed angular distribution technique. The nuclear reaction Ho-165(C-12, 4n gamma)Ta-173 was used to populate these isomeric states, and the recoiling 173Ta 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(-)) = +0.591(18) shows that the 9/2(-) 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(-)) = +0.620(15) and multi-quasiparticle calculations, the 21/2(-) isomeric state is assigned a mixed configuration: pi(3){9/2(-)[514], 7/2(+)[404], 5/2(+)[402]} (39%) and pi(1){7/2(+)[404]}circle times v(2){7/2(-)[514], 7/2(+)[633]} (61%).