title: Dicluster stopping in a degenerate electron gas
abstract: In this paper we report on our theoretical studies of various aspects of the correlated stopping power of two pointlike ions (a dicluster) moving in close but variable vicinity of each other in some metallic target materials, the latter being modeled by a degenerate electron gas with appropriate densities. Within the linear-response theory we have made a comprehensive investigation of correlated stopping power, vicinage function and related quantities for a diproton cluster in two metallic targets, aluminum and copper, and present detailed and comparative results for three approximations to the electron gas dielectric function, namely, the plasmon-pole approximation without and with dispersion as well as with the random-phase approximation. The results are also compared, wherever applicable, with those for an individual projectile.
authors.affiliation: Theoretical Physics Division, Institute of Radiophysics and Electronics, Ashtarak-2, 378410, Armenia.
authors.initials: HB
authors.lastname: Nersisyan
authors.initials: AK
authors.lastname: Das