Nuclear Scattering of 17-Mev Gamma-Rays

The nuclear scattering of gamma-rays from the ${\mathrm{Li}}^7(p,\gamma ){\mathrm{Be}}^8$ reaction has been measured. The scatterers used were Bi, Pb, Sn, and Cu. The observed $Z$ dependence of the elastically scattered gamma-rays varied as $Z^{2.5\pm 0.5}$, while the inelastically scattered gamma-rays varied at a rate greater than $Z^{2.9\pm 0.3}$. An appreciable amount of inelastic scattering was observed.