Systematic study of helium-induced L shell ionization cross sections

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An experimental data set consisting of about 500 published cross section values has been applied to test the performance of various theoretical approximations for the description of the helium-induced L-subshell ionization of heavy elements (Z2 = 66-92). The large discrepancy observed previously between the L2-subshell data and the predictions of the ECPSSR model has been greatly reduced including the effect of the collision-induced intrashell transitions. Further improvements in the description of the data, particularly for the L3 Subshell, have been achieved modifying the binding energy correction of the ECPSSR theory according to the recent suggestion by Vigilante et al. The use of more realistic electronic wave functions than those applied in ECPSSR is discussed as a possible way to remove the remaining discrepancies.

Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalNuclear Inst. and Methods in Physics Research, B
Issue number2
Publication statusPublished - Aug 1991

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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