Kinetic Energy Threshold of M-X Spectra Emitted by Interaction of ~(152)Eu~(20+) on Au

It is measured that the characteristic X-ray spectra of Mζ,Mα and Mδ of Au and the characteristic X-ray spectra of Mα of Eu produced by the interaction of highly charged ions of152Eu20+ with kinetic energy 2.0 MeV on Au surface.The micro-mechanism of X-ray excitation is preliminary analyzed.The kinetic energy threshold of M-X ray of Au and M-X ray of Eu emitted by Eu20+ with Au is estimated by semiclassical approximation theory of binary collision.The threshold has important referenced value in the study on dynamics of the interaction of highly charged ions with solid surface and on how to choose better target and projectile combination in the conversion effciency of radiation energy.