The angular correlation of the 7/2-~9/2 + lt4keVX ,7/2 + is measured at Ea = 300 keY and found to be A2(/~,7)=0.108_+0.028. The result is combined with the data on longitudinal polarisation nuclear orientation to obtain the nuclear matrix elements which would give a simultaneous fit to all experimental data. The matrix elements thus obtained have predicted the/~ spectrum shape correction factor. The sizes of the matrix elements indicate a cancellation effect in vector matrix elements which explains deviation from i-approximation. From the ratio of higher order matrix elements, 2, the deviation from the CVC ratio due to Fujita is found and thus the importance of off-diagonal elements in H C is noted. The experimental matrix elements are compared with the modelpredicted ones.

The 786keV beta-286keV gamma angular correlation in the ground state decay of 149pm is measured for the first time, using the conventional slow-fast scintillation assembly. Integral correlation results characterize the involved beta transition to be of first-forbidden non-unique type. The present results combined with the other experimental parameters, strongly support a 9/2-spin-parity character to the 286keV level in 149Sm. The energy independence of the reduced correlation coefficient as found in this work shows the validity of i-approximation for the 786 keV beta transition in 149pm and is also consistent with the logft value and spectrum shape reported by earlier authors.