Target K-shell ionization accompanied by single and double capture in F9++Ar collisions

Cross sections for target Ar K-shell X-ray emission accompanied by single and double electron capture, as well as the total cross sections for single and double electron capture, have been measured for incident 1.8-2.4 MeV/u F9+ ions colliding with Ar. Coincidences between the detected X-rays and the charge-changed projectile ions were recorded. Preliminary analysis indicates total cross sections for single electron capture on the order 10-17cm2, with those for double capture being about an order of magnitude smaller. The corresponding cross sections for target K-shell X-ray emission accompanied by single and double electron capture, despite being about 103 times smaller, are nearly flat and approximately equal, a result that was not expected.