Studies on Gamma Decay of ^180mHf

Abstract

The decay of 5.5 h ^180mHf was studied with double focusing beta-ray spectrometers. Both internal and external conversion electrons have been measured, for most of gamma transitions in the decay. The corresponding conversion coefficients have been obtained. Three new weak lines have been observed with energies, 547.6±0.5, 772.3±0.7 and 832.0±0.8 keV. A decay scheme consistent with all of our observations was constructed, Arguments for parity mixing in ¹⁸⁰Hf are given. Implications of the results for current nuclear theories are discussed.