Cometary X-ray emission: theoretical cross sections following charge exchange by multiply charged ions of astrophysical interest

Journal Article · Tue Feb 13 00:00:00 EST 2007 · Canadian Journal of Physics

OSTI ID:972837

Otranto, S; Olson, R E; Beiersdorfer, P

The CTMC method is used to calculate emission cross sections following charge exchange collisions involving highly charged ions of astrophysical interest and typical cometary targets. Comparison is made to experimental data obtained on the EBIT machine at Lawrence Livermore National Laboratory (LLNL) for O{sup 8+} projectiles impinging on different targets at a collision energy of 10 eV/amu. The theoretical cross sections are used together with ion abundances measured by the Advanced Composition Explorer as well as those obtained by a fitting procedure using laboratory emission cross sections in order to reproduce the x-ray spectrum of comet C/LINEAR S4 measured on July 14th 2001.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 972837
• Report Number(s): UCRL-JRNL-228124; CJPHAD; TRN: US1001549
• Journal Information: Canadian Journal of Physics, Vol. 86, Issue 1; ISSN 0008-4204
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
74 ATOMIC AND MOLECULAR PHYSICS
CHARGE EXCHANGE
COMETS
CROSS SECTIONS
LAWRENCE LIVERMORE NATIONAL LABORATORY
PROJECTILES
TARGETS