The Angular Distributions of the Products of the D - D Reaction: 1 to 3.5 Mev

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Abstract

Cross sections per unit solid angle for the reactions ${\mathrm{H}}^{2}+{\mathrm{H}}^{2}\ensuremath{\rightarrow}{\mathrm{He}}^{3}+n$ and ${\mathrm{H}}^{2}$+${\mathrm{H}}^{2}$\ensuremath{\rightarrow}${\mathrm{H}}^{1}$+${\mathrm{H}}^{3}$ have been measured at various angles for incident deuterons of energies from 1 to 3.5 Mev. The dependence of the cross sections on angle is nearly the same for the two reactions, and it can be represented by an expression of the form $A(1+B{cos}^{2}\ensuremath{\varphi}+C{cos}^{4}\ensuremath{\varphi})$, where $\ensuremath{\varphi}$ is the angle of observation in the center of mass coordinate system. $A$ increases from ${4\ifmmode\times\else\texttimes\fi{}10}^{\ensuremath{-}27}$ ${\mathrm{cm}}^{2}$ at 1 Mev to 6\ifmmode\times\else\texttimes\fi{}${10}^{\ensuremath{-}27}$ ${\mathrm{cm}}^{2}$ at 3.5 Mev; $B$ decreases from approximately 1 at 1 Mev to -3.5 at 3.5 Mev; $C$ increases from 1.5 at 1 Mev to 7 at 3.5 Mev. The total cross sections for the two reactions are approximately constant at ${10}^{\ensuremath{-}25}$ ${\mathrm{cm}}^{2}$ throughout this energy range.

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