Occupation of Fine-Structure States in Electron Capture and Transport

Journal Article · Tue Apr 01 00:00:00 EDT 2008 · Physical Review A

DOI:https://doi.org/10.1103/PhysRevA.77.042713· OSTI ID:939408

Seliger, M ^[1]; Reinhold, Carlos O ^[2]; Minami, Tatsuya ^[2]; Schultz, David Robert ^[2]; Yoshida, S ^[3]; Burgdorfer, J ^[3]; Lamour, E ^[4]; Rozet, J -P ^[4]; Vernhet, D ^[4]

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1. Institute of Physics, Karl-Franzens Universitat Graz
2. ORNL
3. Institute for Theoretical Physics, Vienna University of Technology, Austria
4. Institut des NanoSciences de Paris, Univ. Paris VI

We study the population of the fine-structure states in excited-state manifolds of hydrogenic Ar{sup 17+} ions resulting from charge transfer in collisions of 13.6 MeV/amu Ar{sup 18+} ions with thin carbon foils or CH{sub 4} and N{sub 2} gases. Experimental information on excited states populations is determined by x-ray spectroscopy of individual fine-structure components of the Lyman series allowing for sensitive probes of relativistic effects during the primary charge transfer and the subsequent transport. We show that the ratio of the populations of the 2p{sub 1/2} and 2p{sub 3/2} states provides clear evidence for spin dependent relativistic effects at moderately relativistic speeds.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 939408
• Journal Information: Physical Review A, Vol. 77, Issue 4; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ARGON IONS
CARBON
METHANE
NITROGEN
COLLISIONS
ELECTRON CAPTURE
EXCITED STATES
FINE STRUCTURE
LYMAN LINES
ELECTRONIC STRUCTURE
X-RAY SPECTROSCOPY