The Energies of the $\gamma -\mathrm{R}\mathrm{a}\mathrm{y}\mathrm{s}$ from ${\mathrm{Sb}}^{122}$, ${\mathrm{Cd}}^{115}$, ${\mathrm{Ir}}^{192}$, ${\mathrm{Mn}}^{54}$, ${\mathrm{Zn}}^{65}$, and ${\mathrm{Co}}^{60}$

The energies of the $\gamma -\mathrm{r}\mathrm{a}\mathrm{y}\mathrm{s}$ emitted in the disintegration of some radioelements have been determined by means of a magnetic spectrograph. The results may be summarized as follows: The quantum energies were obtained from the end points of distributions in momentum of Compton secondaries arising from the several $\gamma -\mathrm{r}\mathrm{a}\mathrm{y}\mathrm{s}$. Qualitative results obtained from observations on several other $\gamma -\mathrm{r}\mathrm{a}\mathrm{y}$ emitters are briefly discussed.