Fine structure of the strength function for the β + /EC decay of the 160 m Ho (5.02 h) isomer

The strength function for the β + /EC decay of the deformed nucleus of the 160 m Ho (5.02 h) isomer is obtained from the experimental data, The fine structure of the strength function S β ( E ) is analyzed. It has a pronounced resonance structure for Gamow-Teller transitions and is found to exhibit a resonance structure for first-forbidden transitions. It is shown that for some excitation energies of the 160Dy daughter nucleus the probability of first-forbidden β + /EC transitions in the decay of the 160 m Ho isomer is comparable with the probability of Gamow-Teller β + /EC transitions.