Abstract
The gamma transitions in 177Hf have been measured using a 50cm radius iron-free double focusing beta-ray spectrometer. The decay scheme is investigated and the K-conversion coefficients of the 208 and 321 keV transitions have been determined. Comparison with theoretical conversion coefficients for pure El radiation calculated by Sliv and Band indicates that the K-conversion process of the 208 keV transition is normal while the large anomaly observed in the K-conversion process of the 32l keV E1 transition is compatible with a large M2 admixture or more probable with the presence of penetration matrix elements. From comparison with theoretical conversion coefficients the 113 keV M1+E2 transition has been found to be (95.12+0.6)% E2 corresponding to |δ| = 4.38±0.33. The decay scheme of 177Lu is discussed in terms of nuclear models.
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