Gamma-ray strength functions in thermally excited rotating nuclei

摘要

A general discussion and illustration is given of strength functions for rotational transitions in two-dimensional E_γ1×E_γ2 spectra. Especially, a narrow component should be proportional to the compound damping width, related to the mixing of basis rotational bands into compound bands with fragmented transition strength. Three E_γ1×E_γ2 spectra are made by setting gates on triple coincidences, selecting cascades which feed into specific low-lying bands in the nucleus ~168Hf. In each of the gated spectra, we find a ridge, carrying about 100 decay paths.