Abstract
Absolute cross sections are reported for single, double, and triple charge exchange of Feq+ (q=5-
13) ions with CO and CO2. The highly-charged Fe ions are generated in an electron cyclotron
resonance ion source. Absolute data are derived from knowledge of the target gas pressure,
target path length, and incident and charge-exchanged ion currents. Experimental results are
compared with new calculations of these cross sections in the n-electron classical trajectory
Monte-Carlo approximation, in which the ensuing radiative and non-radiative cascades are
approximated with scaled hydrogenic transition probabilities and scaled Auger rates. The
present data are needed in astrophysical applications of solar- and stellar-wind charge-exchange
with comets, planetary atmospheres, and circumstellar clouds.