Angular Distribution of Gamma Rays Following Coulomb Excitation in Even-Even Nuclei

The angular distributions of gamma radiation from Coulomb excitation with respect to the incident proton beam on thick targets have been measured in the even-even nuclei ${\mathrm{Ru}}^{104}$, ${\mathrm{Pd}}^{108}$, ${\mathrm{Pd}}^{110}$, ${\mathrm{Cd}}^{110}$, ${\mathrm{Cd}}^{112}$, ${\mathrm{Cd}}^{114}$, ${\mathrm{Cd}}^{116}$, ${\mathrm{Os}}^{190,192}$, and ${\mathrm{Pt}}^{194}$. The particle parameters $a_{\nu }$ for a thick target deduced from the measurements on ${\mathrm{Ru}}^{104}$, ${\mathrm{Pd}}^{110}$, ${\mathrm{Cd}}^{114}$, and ${\mathrm{Pt}}^{194}$ agree to within the accuracy of the experiments (±2 to 5% for $a_2$) with the numerical results from the quantum-mechanical treatment of the Coulomb excitation process.