Decay Scheme ofRe183and Rotational Bands of Daughter NucleusW183

Abstract

The electron-capture decay of 70-day ${\mathrm{Re}}^{183}$ has been studied, principally by conversion electron spectroscopy at 0.1% resolution. All but one of the eighteen gamma transitions identified in the present study have been seen by others from beta decay of ${\mathrm{Ta}}^{183}$ to the same daughter nucleus ${\mathrm{W}}^{183}$. The transition intensities of the present study suggest an assignment of $\frac{5}{2}+$ to ${\mathrm{Re}}^{183}$. New information on $M1-E2\mathrm{}$ mixing ratios for some of the gamma transitions is obtained.