1986 Volume 55 Issue 4 Pages 1108-1121
Gamma-gamma angular correlations have been measured for 25 cascading transitions in 149Pm following the decay of 1.7-h149Nd. The spins of the 288.21-, 425.30- and 515.66-keV levels in 149Pm have been assigned as 9/2, 7/2 and 9/2, respectively. The E2/M1 mixing ratios of 15 transitions have been derived. A new level at 872.32 keV has been introduced from the results of γ-ray singles and γ-γ coincidence measurements. Experimental level energies and E2/M1 mixing ratios have been compared with predictions based on current theoretical models.
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