Resonance interference and absolute cross sections in near-threshold electron-impact excitation of the 3s{sup 2}{sup 1}S{r_arrow}3s3p{sup 3}P and 3s{sup 2}{sup 1}S{r_arrow}3s3p{sup 1}P transitions in Ar{sup 6+}
- JILA, National Institute of Standards and Technology and the University of Colorado, Boulder, Colorado 80309-0440 (United States)
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6372 (United States)
- University College London, London WC1E6BT (United Kingdom)
Strong resonance features were observed in the near-threshold excitation of Ar{sup 6+}. Absolute total cross sections for electron-impact excitation of the 3s{sup 2}{sup 1}S{r_arrow}3s3p{sup 3}P{sup o} and 3s{sup 2}{sup 1}S{r_arrow}3s3p{sup 1}P{sup o} transitions in Ar{sup 6+} were measured by using the merged electron-ion beams energy loss technique. The results are compared with the R-matrix close-coupling theory (CCR) and the independent-process isolated-resonance distorted-wave approximation. Observed disagreement between CCR theory and experiment at the near-threshold peak for the 3s{sup 2}{sup 1}S{r_arrow}3s3p{sup 3}P{sup o} transition is interpreted to be due to very sensitive resonance interference. {copyright} {ital 1997} {ital The American Physical Society}
- DOE Contract Number:
- AI05-86ER53237
- OSTI ID:
- 497650
- Journal Information:
- Physical Review A, Journal Name: Physical Review A Journal Issue: 3 Vol. 55; ISSN 1050-2947; ISSN PLRAAN
- Country of Publication:
- United States
- Language:
- English
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