Resonance Interference and Absolute Cross Sections in Near-Threshold Electron-Impact Excitation of Multicharged Ions

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Strong resonance features were observed in near-threshold excitation of {sup 1}S right arrow {sup 3}P intercombination transitions in Si(2+), Ar(6+), and Kr(6+). Such resonances are predicted to dominate over direct excitation by more than an order of magnitude in the threshold region. Absolute cross sections were measured by using the merged electron-ion beams energy loss technique. The results are compared with R-matrix close-coupling (CCR) theory for all of the ions. Several discrepancies in resonance positions and magnitudes exist between experiment and theory for these spin forbidden transitions.

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6 p.

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Bannister, M. E.; Chung, Y-S.; Djuric, N.; Wallbank, B.; Woitke, O.; Zhou, S. et al. December 31, 1997.

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Strong resonance features were observed in near-threshold excitation of {sup 1}S right arrow {sup 3}P intercombination transitions in Si(2+), Ar(6+), and Kr(6+). Such resonances are predicted to dominate over direct excitation by more than an order of magnitude in the threshold region. Absolute cross sections were measured by using the merged electron-ion beams energy loss technique. The results are compared with R-matrix close-coupling (CCR) theory for all of the ions. Several discrepancies in resonance positions and magnitudes exist between experiment and theory for these spin forbidden transitions.

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6 p.

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OSTI as DE97008899

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  • 20. international conference on the physics of electronic and atomic collisions and exhibition, Vienna (Austria), 23-29 Jul 1997

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  • Other: DE97008899
  • Report No.: ORNL/CP--94782
  • Report No.: CONF-970710--
  • Grant Number: AC05-96OR22464;AI05-86ER53237
  • Office of Scientific & Technical Information Report Number: 629309
  • Archival Resource Key: ark:/67531/metadc690919

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  • December 31, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 20, 2016, 6:17 p.m.

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Bannister, M. E.; Chung, Y-S.; Djuric, N.; Wallbank, B.; Woitke, O.; Zhou, S. et al. Resonance Interference and Absolute Cross Sections in Near-Threshold Electron-Impact Excitation of Multicharged Ions, article, December 31, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc690919/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.