The Yield Function and Angular Distribution of the D+D Neutrons

Abstract

The thin target yield of neutrons from the D+D reaction has been measured for deuteron energies 0.5-1.8 Mev. The neutron yield in the forward direction increases smoothly throughout the interval, but the yield at 80° to the bombarding beam remains almost constant. Values of $A$ in the expression ($1+A{cos}^2\theta$) representing the angular distribution of the neutrons in the c.g. system are calculated from the yield data and plotted as a function of voltage. $A$ is found to increase from 1.8 at 0.5 Mev deuteron energy to 3.4 at 1.8 Mev.