X-ray spectrum emitted by the impact of ¹²⁹Xe²⁶⁺ of the different kinetic energies on Au surface

The characteristic X-ray spectra produced by the impact of ¹²⁹Xe²⁶⁺ with kinetic energies from 350 to 600 keV and from 1.8 to 3.9 MeV on Au surface are measured. It is found that ¹²⁹Xe²⁶⁺ with kinetic energies from 350 to 600 keV can excite only the characteristic X-ray spectra of Mα of Au, but ¹²⁹Xe²⁶⁺ with kinetic energies from 1.8 to 3.9 MeV can excite the characteristic X-ray spectra of Mζ, Mα, Mγ and Mδ. The relation between the characteristic X-ray intensity, the ratio of X-ray yield and the ion kinetic energy is analyzed. The kinetic energy threshold of L-X-ray of Xe emitted by Xe²⁶⁺ is estimated.