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

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 L_l 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 L_l line, have been compared with the theoretical ones. [ABSTRACT FROM AUTHOR]