Cross section and asymmetry parameter calculations for the C 1s photoionization of CH{sub 4}, CF{sub 4}, and CCl{sub 4}
Journal Article
·
· Physical Review. A
- Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, Unicamp, 13083-970 Campinas, Sa(tilde sign)o Paulo, (Brazil)
We have computed cross sections and asymmetry parameters for the C 1s photoionization of CX{sub 4} (X=H, F, Cl) using the Schwinger variational method with Pade corrections. We present a comparative study that shows the influence of the identity of the X atom on the computed cross sections. Predicted cross sections are in good agreement with available photoionization and photoabsorption experimental data. We conclude that the presence of heavy outer atoms produces resonance structures in the photoionization cross sections and in the asymmetry parameters. We find a single nonvalence resonant state in the photoionization of CF{sub 4} and multiple resonances in CCl{sub 4} that have significant d-orbital character in the vicinity of the Cl atoms.
- OSTI ID:
- 20640175
- Journal Information:
- Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 68; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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