Angular Distribution of Gamma Rays in Coulomb Excitation from Pt

A numerical calculation has been made of the angular correlation coefficient, $a_2\left(\xi \right)$, in Coulomb excitation in both the quantum-mechanical treatment and the semiclassical approximation. The parameters $\xi$ and $\eta$ were chosen to correspond to excitation of the 330-kev level of ${\mathrm{Pt}}^{194}$. The radial integrals entering the quantum calculation have been evaluated in the semiclassical approximation. Both the classical and quantum calculations are found to reproduce the experimentally observed energy dependence of $a_2\left(\xi \right)$, and the quantum treatment gives rather satisfactory agreement with the experimental absolute values as well.