Proton-Gamma Ray Angular Correlations in theSi28(d, pγ)Si29Reaction

The ${\mathrm{Si}}^{28}(d, p\gamma ){\mathrm{Si}}^{29}$ reaction has been studied by measuring angular distributions of the protons leaving ${\mathrm{Si}}^{29}$ in its first and second excited states and by measuring the correlation between the protons of each group and the gamma rays emitted from the corresponding level. The angular distributions of proton groups $p_1$ and $p_2$ exhibit large peaks in the backward direction, indicating that heavy-particle stripping may be important. The ($p_1, \gamma$) correlations were found to be isotropic to ±6%. This is substantially different from the correlation which has been observed at a higher deuteron energy. The ($p_2, \gamma$) correlations are consistent with a $\frac{5}{2}+$ level in ${\mathrm{Si}}^{29}$ at 2.03 Mev. One ($p_2, \gamma$) correlation shows a 20% anisotropy in the plane perpendicular to the direction taken by the recoil nucleus, while another ($p_2, \gamma$) correlation is essentially isotropic.