Angular dependence of L x-ray emission in high-Z atoms bombarded by 18–60 MeV fluorine ions

Abstract

The L x-ray intensities of 79Au, 82Pb and 83Bi have been measured in collisions with 18–60 MeV fluorine ions in an angular range 20°–75°. The Ll x-ray intensity, normalized to the intensity of other L x-ray lines in the same spectrum, shows an anisotropic emission pattern and the degree of anisotropy depends on the impact energy of the projectile. The alignment parameter values for the L3 subshell, deduced from the measured anisotropy parameter for the Ll line, have been compared with the theoretical ones.