2ND MINIMUM LIFETIME MEASUREMENTS IN ND-133 AND ND-137

The quadrupole moments (Q0) of the highly deformed, second minimum bands in Nd-133 and Nd-137 have been extracted from mean lifetime measurements using the Doppler shift attenuation method. The reactions Pd-105(S-32,2p2n)Nd-133 at 152 MeV and Ru-104(S-36,3n)Nd-137 at 145 MeV were used. A standard centroid shift analysis was carried out in both cases, which gave values of Q0 = (6.0+/-0.7)e b and (4.0+/-0.5)e b for Nd-113 and Nd-137, respectively, corresponding to axial prolate deformations of beta-2 congruent-to 0.33 and congruent-to 0.22. A line-shape analysis was also carried out for Nd-133 to check against the possible effect of sidefeeding. The result was Q0 = (6.7 + 0.7)e b, with sightly slower sidefeeding times corresponding to Q(sf)BAR congruent-to 5.3e b. The results are in good agreement with the predictions of total Routhian surface calculations, and are discussed in the context of other highly deformed bands in the A = 130-140 mass region.