INNER-SHELL (E,2E) PROCESSES

The great advantage of coincidence measurements is that by suitable ch oice of the kinematical and geometrical arrangement one may probe deli cate physical effects that would be swamped in less differential exper iments. The calculation of the triple-differential cross section for t he inner shell ionization of high-Z elements at relativistic energies presents a serious challenge to theory. Relativistic effects enter in both the kinematics and the nature of the target, and the large atom e xerts a strong distorting influence. We consider such processes in a r ange of geometries and kinematics. We report the results of fully rela tivistic distorted wave calculations. Results are presented for silver , gold, and uranium targets and suggestions for further experimental a rrangements proposed where delicate relativistic effects should he rea dily detectable.