Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..dmp.j6083n&link_type=abstract
American Physical Society, 2002 Division of Atomic, Molecular and Optical , abstract #J6.083
Physics
Scientific paper
To shed light on the contribution of multiple-electron capture (MEC) processes to the cometary X-ray emission, we have carried out laboratory investigations of such processes. The experiments involved the triple-coincidence detection of X-rays, scattered projectile, and recoil ions in 100-keV Ne^10+ on He, Ne, and Ar collisions. In addition to the X-ray energy and the final projectile and recoil ions' charge states, the measurements provide the collision Q-value through the COLTRIMS technique. The measurements enable the separation of single-electron capture and MEC collisions, and provide X-ray spectra specific to the number of captured electrons. The measurements provide unequivocal evidence for the important role played by MEC processes. The experimental results for double-electron capture will be compared with theoretical predictions.
Ali Rafia
Beiersdorfer Peter
Harris C. L.
Neill P. A.
Raković M. J.
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