A Study of the Radiations from Columbium (95), Rhenium (188), Osmium (191), and Osmium (193)

The characteristic radiations of ${\mathrm{Cb}}^{95}$, ${\mathrm{Re}}^{188}$, ${\mathrm{Os}}^{191}$, and ${\mathrm{Os}}^{193}$ have been investigated by absorption and coincidence methods. Maximum beta-ray energies were determined by aluminum absorption, and maximum quantum energies were measured by coincidence absorption of the secondary electrons in aluminum. Beta-beta-, beta-gamma-, and gamma-gamma-coincidence rates were measured when possible. Some remarks concerning ${\mathrm{Sb}}^{124}$ and ${\mathrm{Au}}^{198}$ are also included.