X-ray spectrum emitted by the impact of ¹⁵²Eu²⁰⁺ of near Bohn velocity on Au surface

The characteristic X-ray spectra produced by the impact of highly charged ions of ¹⁵²Eu²⁰⁺ with energies from 2.0 to 6.0 MeV on Au surface are measured. It is found that highly charged ions could excite both the characteristic X-ray spectra of M_ζ, M_α and M_δ of Au and the characteristic X-ray spectra of M_α of Eu. The total X-ray yield increases with the ion kinetic energy increasing. The total production cross section of Au induced by Eu²⁰⁺ is measured and compared with those obtained from the binary encounter approximation, plane-wave-Born approximation, and the energy-loss Coulomb deflection perturbed stationary state relativistic theoretical models.