The Beta- and Gamma-Rays ofRb86

The beta- and gamma-rays of ${\mathrm{Rb}}^{86}$ (19.5 d) have been measured in a magnetic lens spectrometer. Measurement of the energies of photoelectrons produced in a lead radiator shows one line corresponding to a gamma-ray of energy 1.081 Mev. The beta-ray spectrum is resolvable into two groups with end point energies of 1.822 and 0.716 Mev.