Abstract

The β-decay of146Dy80 was studied by γ-ray and conversion electron spectroscopy following on-line mass separation. 58 % of the β-decay proceeding to a group of levels close to 2 MeV excitation is attributed to GT-decay of (πh112/2)0+ pairs populating (πh11/2νh9/2νj0−2)1+ states in146Tb81. The total decay strength is significantly higher than found in148Dy82 decay, which arises from GT-transitions involving the ν-holes.

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