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FIZIKA A 19 (2010) 3 , 153-164
 
EMISSION OF SHORT-WAVE RADIATION DURING ION IMPACT ON SOLID SURFACES
M. S. JWAD, H. A. JASSEM and T. A. SELMAN
Department of Physics, College of Science, Basrah University, Basrah, Iraq
Received 26 February 2010; Revised manuscript received 22 September 2010
Accepted 1 December 2010 Online 7 March 2011
The possibility of short-wave photon emission during
surface scattering of positive ions is
investigated by selection of the type of charge-exchange
process (one- or two-electron processes), through the calculation
of the neutralization probabilities and the charge-transfer
cross sections. These probabilities are calculated statically
as a function of distance between the incident ion and the
surface, and dynamically as a function of the ion velocity.
The model is applied to real systems such as
He+/semiconductor (silicon and germanium), taking into
account the difference in the physical constants of
the two systems. We found that emitted photons
have short wavelengths, lying in the ultraviolet range of the
electromagnetic spectrum of the helium emission spectrum.
PACS numbers: 79.20.Rf, 52.25.Qt
UDC 538.971, 537.534.8
Keywords: impact of He+ on surfaces, charge transfer process, neutralization probabilities, short-wave emission
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