Measurement of the g factor of the Pu237 short-lived fission isomer

The perturbed-angular-distribution method has been used to measure the g factor of the =122(10)-nsec fission isomer in Pu237. To eliminate unwanted perturbations, a special cubic nonparamagnetic alloy, U235Ir2, was heated to 950°C and used as the target. The quantities measured were A22=+0.21(6) and g=-0.45(3). The g factor is consistent with the I=32 ground state of the 871 + Nilsson orbital, and the fission anisotropy is consistent with K=12 at the second saddle point.