Measurement of Energy Levels inF19andO16

Abstract

The broad-range magnetic spectrograph of the Massachusetts Institute of Technology High Voltage Laboratory has been used to study the proton groups from the reaction ${\mathrm{F}}^{19}(p, p^{\prime }){\mathrm{F}}^{19*}$ and the alpha-particle groups from the reaction ${\mathrm{F}}^{19}(p, \alpha ){\mathrm{O}}^{16*}$. The incident protons had an energy of 7 Mev and were produced by the MIT-ONR Van de Graaff generator. The ground-state $Q$ value for the ${\mathrm{F}}^{19}(p, \alpha ){\mathrm{O}}^{16}$ reaction was found to be 8.110±0.010 Mev. Values of the energy levels of ${\mathrm{F}}^{19}$ and ${\mathrm{O}}^{16}$ are given up to 4.05 and 11.3 Mev, respectively.