Fine structure of the strength function for β + / EC decay of 160 g Ho (25.6 min)

A strength function for the β + / EC decay of the deformed 160 g Ho (25.6 min) nucleus has been obtained from experimental data. The fine structure of the strength function S β ( E ) is analyzed. It is found to have a pronounced resonant structure for Gamow-Teller transitions. In S β ( E ) with μ τ = +1 the Gamow-Teller resonance has been observed to split into two components. This splitting is associated with anisotropy of isovector density oscillation in deformed nuclei. The β + / EC strength function for first-forbidden transitions is obtained in the Coulomb (ξ) approximation. It is shown that S β ( E ) for first-forbidden transitions does not have a pronounced resonant structure.