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

Abstract 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 F 9+ 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 - 17 cm 2 , 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 10 3 times smaller, are nearly flat and approximately equal, a result that was not expected.