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Energy loss of slow single-centre projectiles in electron gas

Calculations of the electronic energy loss and the straggling of the energy loss for slow single-centre projectiles in the degenerate electron gas are reported. The Hartree-Fock-Slater description of the projectile (few bound electrons) and the density function formalism (many electrons) together with the dielectric function method are used. The stopping and straggling effective charges for the energy loss are analysed and found to differ from each other and to depend on the one-electron radius , on the projectile atomic number and on the number of electrons carried by the projectile. Results of calculations are compared with available experimental data and a good agreement is found.