Distribution in Angle of Protons from the Deuteron-Deuteron Reaction

The distribution in angle of the protons from the deuteron-deuteron reaction has been measured with a gas target over a range of bombarding energy from 60 to 390 Kev. The results are representable by $N\left(\theta \right)=1+A {cos}^2\theta$ in which $\theta$ is the angle which the proton's velocity makes with the direction of the deuteron beam as measured in the center-of-mass coordinate system and $N\left(\theta \right)$ is the number observed per unit solid angle at $\theta$. The value of $A$ is found to be markedly dependent on bombarding energy.