Coincidence Experiments on ${\mathrm{Sc}}^{46}$, ${\mathrm{Ga}}^{72}$, ${\mathrm{Au}}^{198}$, and ${\mathrm{Rb}}^{86}$

Gamma-gamma- and beta-gamma-coincidences have been investigated in the disintegration of the active isotopes ${\mathrm{Sc}}^{46}$, ${\mathrm{Ga}}^{72}$, ${\mathrm{Au}}^{198}$, and ${\mathrm{Rb}}^{86}$. Gamma-gamma-correlation was found in ${\mathrm{Sc}}^{46}$ and in ${\mathrm{Ga}}^{72}$ but not in ${\mathrm{Au}}^{198}$ or ${\mathrm{Rb}}^{86}$. The beta-ray spectra of ${\mathrm{Sc}}^{46}$ and ${\mathrm{Au}}^{198}$ are found to be simple on the basis of beta-gamma-coincidence measurements, while those of ${\mathrm{Ga}}^{72}$ and ${\mathrm{Rb}}^{86}$ are complex. Gamma-ray energies and beta-ray maximum energies were determined by absorption methods.