Luminescence from low-energyHe+/Xe charge-transfer reactions

Optical emissions produced by collision of 100-eV ${\mathrm{He}}^{+}$ ions with Xe atoms have been studied over the spectral range from 40 to 900 nm. All of the major lines in the emission spectrum can be assigned to transitions in Xeii resulting from charge-transfer reactions. Emission cross sections for the major lines in the vacuum-ultraviolet and visible spectral regions are reported and the importance of cascading is assessed. The kinetic energy dependence is discussed for several of these lines.