X ray spectra induced by 129Xe30+ impacting the Au surface

Le résumé fourni par la source

X ray emission from Xe30+ ions (kinetic energy 350-600 keV) impacting on an Au target surface was investigated. The 1.65 keV M-X ray and the Au atomic Mα characteristic X rays were measured. The results show that because the 3d electron of the Xe ion is excited to occur a vacancy, the 1.65 keV M-X ray are emit from the electron transition between 4f to 3d energy level. The 3s electron of the Au target atom is ionized to form a hole in the M-shell, the Mα characteristic X rays are radiated by 4f electron filling in the hole. It was also found that the yield of such characteristic X rays is decreasing with increasing the projectile kinetic energy. The yield of the characteristic Au X rays increases with increasing the projectile kinetic energy. These phenomena are analyzed with the classical coulomb over the barrier mode.

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