BETA AND GAMMA VIBRATIONAL BANDS IN 152SM AND 154GD

Relative intensities of gamma transitions in 152Sm, 152Gd and 154Gd were measured using a Ge(Li) detector. Several new gamma transitions were observed. Angular correlation experiments were performed to determine the multipole mixing ratios of transitions from the gamma vibrational band to the ground state band in 154Gd. It is found that neither the beta nor the gamma band transition strengths in 152Sm and 154Gd can be accounted for by a single parameter band-mixing theory, nor can agreement be found by considering mixing between the beta and the gamma band. Transition rates from the negative parity levels also disagree with predictions of the strong coupling model including first order corrections. © 1969.