Experimental investigation of the angular dependence of photon-induced differential cross-sections of L X-rays from U, Th and Bi at 59.5 keV

Abstract

The differential cross-sections for the emission of L(Top half integral), L?, Lß and L? groups of L X-ray lines from U, Th and Bi have been measured at different angles varying from 45° to 135° at intervals of 15°. The vacancies were created by 59.5 keV ?-rays from 241Am source and L X-rays were measured using a Si(Li) detector. It is found that the L? and Lß groups of L X-rays are isotropic, the L(Top half integral) and L? groups are anisotropic in the spatial distribution.