V.P. Shevelko, D. Kato, M.S. Litsarev and H. Tawara
The Energy-deposition Model: Electron Loss of Heavy Ions in Collisions with Neutral Atoms at Low and Intermediate Energies
Date of publication:
Sep. 03, 2010
loss cross sections, heavy ions, energy-deposition model, rate coefficients
Single- and multiple-electron loss processes in collisions of heavy many-electron ions (positive and negative) in collisions with neutral atoms at low and intermediate energies are considered using the energy-deposition model. The DEPOSIT computer code, created earlier to calculate electron-loss cross sections at high projectile energies, is extended for low and intermediate energies. A description of a new version of DEPOSIT code is given, and the limits of validity for collision velocity in the model are discussed.. Calculated electron-loss cross sections for heavy ions and atoms (N^+, Ar^+, Xe^+, U^+, U^28+, W, W^+, Ge^-, Au^-), colliding with neutral atoms (He, Ne, Ar, W) are compared with available experimental and theoretical data at energies E > 10 keV/u. It is found that in most cases the agreement between experimental data and the present model is within a factor of 2. Combining results obtained by the DEPOSIT code at low and intermediate energies with those by the LOSS-R code at high energies (relativistic Born approximation), recommended electron-loss cross sections in a wide range of collision energy are presented.