Energy and Multipole Order of Nuclear Gamma-Rays

Abstract

The energies of some nuclear gamma-rays emitted in deuteron-induced radioactivities have been measured with a magnetic $\ensuremath{\beta}$-ray spectrograph with photographic film as detector. The energies measured were those of the conversion electrons, and in some cases also those of the photoelectrons ejected from a heavy element. Independent measurements of the multipole order have been obtained where possible from the internal conversion coefficient, the $\frac{K}{L}$ conversion ratio, and the lifetime of the $\ensuremath{\gamma}$-ray transition. In the case of eight out of the fourteen $\ensuremath{\gamma}$-rays measured, a fairly definite assignment of the multipole order has been made. In the nuclei ${\mathrm{Zn}}^{69}$, ${\mathrm{Kr}}^{83}$, ${\mathrm{Sr}}^{87}$, and ${\mathrm{Ag}}^{107\phantom{\rule{0ex}{0ex}}\mathrm{o}\mathrm{r}\phantom{\rule{0ex}{0ex}}109}$ the probable nuclear spins of the states involved are given.