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L-subshell ionization of heavy elements by S ions with energy of 0.4-3.8 MeV/amu |
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| Authors: | I. Fija?-Kirejczyk A. Korman J. Braziewicz U. Majewska W. Kretchmer T. Mukoyama |
| Affiliation: | a Institute of Atomic Energy, 05-400 ?wierk, Poland b The Andrzej So?tan Institute for Nuclear Studies, 05-400 ?wierk, Poland c Institute of Physics, ?wi?tokrzyska Academy, 25-406 Kielce, Poland d Physikalisches Institut, Universität Erlangen-Nürnberg, D-91058 Erlangen, Germany e Heavy Ion Laboratory, Warsaw University, 02-097 Warsaw, Poland f Department of Physics, East Carolina University, Greenville, NC 27858, USA g Kansai Gaidai University, Hirakata, 573-1001 Osaka, Japan h Institut für Physik der Universität Basel, Switzerland |
| Abstract: | The L-shell X-ray production cross sections have been measured for sulphur ions in the energy range of 12.8-120 MeV for Au and Bi elements. The experimental L X-ray spectra were analyzed using the method that takes into account the multiple ionization in outer shells. The L-subshell ionization cross sections have been obtained from measured X-ray production cross sections for resolved Lα1,2 Lγ1 and Lγ2,3 transitions using the L-shell fluorescence and Coster-Kronig yields modified by the multiple ionization effects in the M and N shells. The results are compared with the predictions of ECUSAR theory, which is the modified ECPSSR approach describing both direct ionization and electron-capture processes and the semiclassical approximation (SCA) calculations for direct ionization. These approaches were modified by the L-subshell coupling effects within the “coupled-subshell model” (CSM). Both modified approaches are in good agreement with the data. Remaining discrepancies are discussed in terms of the L-shell decay rates modified for the multiple ionization effects. |
| Keywords: | 34.50.Fa 31.70.&minus f |
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