+ H(1s) collisions at intermediate impact velocities as a new source of UV and VUV radiation

¹ Institute of Physics, PO Box 57, 11001 Belgrade, Yugoslavia
² Institute Isaac Newton of Chile, Yugoslavia Branch, Belgrade, Serbia, Yugoslavia
³ Dept. of Theor. Phys., Campus Plaine, CP 231 Boulevard du Trioumphe, 1050 Bruxelles, Belgium

Corresponding author: A. A. Mihajlov, mihajlov@phy.bg.ac.yu

Received: 24 January 2003
Accepted: 15 January 2004

Abstract

The process of radiative charge exchange in  collisions at the intermediate ion-atom impact velocities are treated in this work as a source of continuous EM emission in the UV and VUV range. The spectral intensity of this emission is determined, within the semiclassical method developed in previous works, for the ion-atom impact energies (in the center of mass reference frame) from 0.5 keV to 12.5 keV. The results obtained show that the spectral intensity of the examined EM emission increases for several orders of magnitude when passing from the visible to the VUV range of wavelength, and that the position of the maximum of this spectral intesity drifts with increase of collision energy from  51 nm to  18 nm. These results imply that considered radiation processes may be of interest in astrophysics as a new sources of continuous short-wave EM emission.