Compound Nucleus Effects in Deuteron Reactions:C13(d, p)C14

Abstract

By using an angular distribution chamber with observation ports at 5° intervals from 5° to 165°, the ${\mathrm{C}}^{13}(d, p){\mathrm{C}}^{14}$ reaction has been studied as a function of the bombarding energy and angle of observation over the range of deuteron energy from 0.6 Mev to 3.0 Mev. A CsI crystal, with a resolution of 4.5 percent for the ground state protons from ${\mathrm{C}}^{13}$+$d$, was used as a detector. Excitation curves were obtained at angles of 20° and 135°. A number of broad maxima were observed, the most pronounced effects occurring near $E_d\cong 1.4$ Mev. Twelve angular distributions were measured, at $E_d=0.64, 0.78, 0.87, 0.98, 1.23, 1.39, 1.48, 1.58, 1.74, 1.99, 2.36, \mathrm{and} 2.84$ Mev. Those distributions obtained below 1.5 Mev are well described by a power series expansion in $cos\theta$, involving terms up to ${cos}^4\theta$. The variation with energy of the angular distributions suggests that for these low bombarding energies the major part of the cross section is probably due to compound nucleus formation. For energies above 1.7, a maximum in the distributions occurs near $\theta \cong 25°$. This peak becomes more pronounced at the higher energies and indicates that for $E_d\stackrel{\backsim }{>}1.7$ Mev, the stripping process becomes increasingly important.