Influence of chemical environment on resonant core excitation of C(1s) in CO{sub 2}, OCS, and CS{sub 2} by electron impact
- Departamento de Fisica, UFSC, 88040-900 Florianopolis, Santa Catarina, (Brazil)
In this work, we report a theoretical study of the role played by chemical environment on the electron-impact resonant core excitations in OCS, CO{sub 2}, and CS{sub 2} molecules. Calculated differential and integral cross sections for the promotion of a carbon 1s electron to the lowest unfilled p{pi} orbital of these molecules, or more specifically, the ratios of these cross sections for the corresponding transitions leading to the singlet and the triplet core-excited states in the 300-800 eV incident energy range, are reported. The distorted-wave approximation was applied to these calculations. Our study revealed resonance structures in the calculated ratios for CO{sub 2}, in good agreement with the available experimental observation, which is very encouraging. On the other hand, no resonance structure is clearly seen in the calculated ratios for OCS and CS{sub 2} molecules. The possible reason for the nonappearance of resonance for these two targets is discussed.
- OSTI ID:
- 20639900
- Journal Information:
- Physical Review. A, Vol. 68, Issue 1; Other Information: DOI: 10.1103/PhysRevA.68.012701; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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