Gamma-Rays from Deuteron Reactions

Gamma-rays from Na, Mg, Al, Si, P, S, and Pb${\mathrm{O}}_2$ targets under cyclotron bombardment by 3.7-Mev deuterons have been measured by coincidence absorption of Compton electrons. With Pb${\mathrm{O}}_2$, Al, and Mg Compton distributions were also obtained by means of a thin lens magnetic spectrometer. Correlation of several of the measured values can be made with excited states of ${\mathrm{N}}^{14}$, ${\mathrm{O}}^{17}$, and ${\mathrm{Si}}^{28}$ as obtained from other information. The predominant gamma-rays have moderately large energy, being 8.8 Mev in one case, indicating a preference for direct transitions from states of high excitation to the ground state of the product nucleus.