Absolute Cross Sections for Near-Threshold Electron-Impact Excitation of the Dipole-Allowed Transitions 3s2 1S -> 3s3p 1P in Cl5+ and 3s 2S ->
- ORNL
Experimental and theoretical cross sections for electron-impact excitation of the dipole-allowed transitions 3s{sup 2 1}S {yields} 3s3p {sup 1}P in Cl{sup 5+} and 3s {sup 2}S {yields} 3p {sup 2}P in Cl{sup 6+} near the excitation thresholds are reported. Absolute cross sections are measured using the merged electron-ion beams energy-loss technique. The intermediate-coupling frame-transformation R-matrix method is used to obtain theoretical cross sections. The total cross sections, for the transitions studied in both ions, exhibit resonance structures near threshold. There is excellent agreement between theory and experiment with respect to both the shape and the magnitude of the cross section for the 3s {sup 2}S {yields} 3p {sup 2}P transition in Cl{sup 6+}. For Cl{sup 5+}, structures and trends in both the present R-matrix calculation and the previous calculation of Baluja and Mohan [J. Phys. B 20, 831 (1987)] agree well with the experimental results. However, the magnitudes of the theoretical cross sections for Cl{sup 5+} are significantly smaller than the measured cross section, which has been corrected for metastable contamination.
- Research Organization:
- ORNL Oak Ridge National Laboratory
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 829196
- Report Number(s):
- P02-112962
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 5 Vol. 65; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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