The characteristic spectral lines of target atoms in the impact of ⁴⁰Ar^q+ ions on metal surfaces

We report the measured results of the 200 nm-1000 nm characteristic spectral lines of target atoms when highly charged ions ⁴⁰Ar ^q+(6≤q≤14) with the same kinetic energy and ⁴⁰Ar⁶⁺ with different kinetic energies are incident upon Al, Ti, Ni, Ta and Au surfaces, respectively. The results for ¹²⁹Xe⁶⁺, ¹²⁹Xe¹⁰⁺ and ¹²⁹Xe¹⁰⁺ with the same kinetic energy (150 keV) incident upon a Ta surface are also reported. These results show that when the projectile and target are properly selected (⁴⁰Ar¹²⁺ impinges on Al, ¹²⁹Xe⁶⁺ impinges on Ta), the spectral intensity of characteristic spectral lines of the target atom is effectively enhanced, and is not strongly dependent on the kinetic energy of the incident ions. Copyright by Science in China Press 2004.