Angular Distribution of Gamma Rays from Coulomb Excitation of Pt and W

Abstract

Data on the unresolved 330- and 358-kev gamma rays from thin natural platinum bombarded by 2- to 4-Mev protons show that the anisotropy of the angular distribution agrees closely with first order Coulomb excitation theory. The thick-target anisotropy of the 114-kev gamma rays from natural tungsten was found to be much more isotropic than the theory predicts. This result can be explained by assuming an extranuclear interaction between the excited tungsten nuclei and electric field gradients within the tungsten lattice.