Stopping of Slow H-, He-, Li- and Be-Like Projectiles in Electron Gas

Marek Moneta Uniwersytet Łódzki, Katedra Fizyki Ciała Stałego, Pomorska 149, 90-236 Łódź, Poland

Received: January 20, 1998; revised version March 23, 1998

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Results of calculations of the electronic stopping power and the energy loss straggling for low velocity H-, He-, Li- and Be-like projectiles in the degenerate electron gas are reported. The Hartree-Fock-Slater description of the projectile and the dielectric function method were used. The size parameter Zmin of the charge distributions calculated from a variational principle depends on the characteristics of the medium. The stopping and straggling effective charges Zef of a projectile were analysed. They were found to differ with each other and to depend on the one-electron radius rs, on the projectile atomic number Zi and on the number of electrons Ni carried by the projectile.

DOI: 10.12693/APhysPolA.93.775 PACS numbers: 71.45.Gm, 34.50.Bw