Inner Beta Spectra ofAg111andRb86

The relatively high comparative half-lives of the low-energy, inner beta-ray group of ${\mathrm{Ag}}^{111}$ and the inner group of ${\mathrm{Rb}}^{86}$ suggest that their spectra may have nonstatistical shapes. The spectra were investigated with a $4\pi$ beta-ray scintillation spectrometer which had been adapted for beta-gamma coincidence studies. Both spectra are found to exhibit nonstatistical shapes.