High Resolution X-ray Spectroscopy of Charge Exchange Collisions of Astrophysical Interest*

Soft X-ray emission following charge exchange (CX) by fully stripped and hydrogen-like ions of carbon, nitrogen, and oxygen on H, H$_{2}$ and He were measured in a collision energy range of 0.5 keV/u -- 30.0 keV/u. CX experiments were performed using the ORNL Multicharged Ion Research Facility ion-atom merged-beams apparatus with a high resolution X-ray quantum calorimeter (XQC) from the University of Wisconsin. First recorded X-ray spectra were made with He and H$_{2}$ gases introduced into the beam line and with ion beams decelerated from a high voltage platform to simulate a range of solar wind ion velocities. Current results are compared with the previous experimental and theoretical studies, and presented along with the status of CX measurements with atomic hydrogen using a merged-beams technique.