X-ray spectra induced in highly charged ⁴⁰Ar^q+ interacting with Au surface

By use of optical spectrum technology, the spectra of X-ray induced by highly charged ⁴⁰Ar^q+ ions interacting with Au surface have been studied. The results show that the argon Ka X-ray were emitted from the hollow atoms formed below the surface. There is a process of multi-electron exciting in neutralization of the Ar¹⁶⁺ ion, with electronic configuration 1s² in its ground state below the solid surface. The yield of the projectile Ka X-ray is related to its initial electronic configuration, and the yield of the target X-ray is related to the projectile kinetic energy.