L. Toth et al., STUDY OF THE AR LMM SPECTRA BY HE+ PROJECTILE AT 1250 KEV, 1500 KEV AND 2000 KEV BOMBARDMENT ENERGIES, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 86(1-2), 1994, pp. 151-154
The influence of He+ ion impact on the Ar LMM spectra was investigated
at the ESA-21 electron spectrometer using three different ion energie
s. Observed line relative energies to the L3M2,3(1D2) line agree well
with other results, but the relative intensities of five angular-isotr
opic lines deviate significantly from other measurements and theory. T
he angular dependence of energy shifts agrees with the quantum PCI the
ory of Barrachina and Macek, except for directions close to 180-degree
s, where a slight enhancement of energy shift was observed. Finally, t
he angular distributions of the L2M2,3(1S0), (1D2) and (3P0,1,2) line
intensities were compared to the alignment theory of Sizov and Kabachn
ik.