Comparative studies of the nonlinear effects occurring when highly charged projectiles collide with hydrogen, a free electron gas, and a harmonic oscillator
We calculate the nonlinear effects that appear at the level of the stopping cross section when heavy bare projectiles collide with both atomic hydrogen and a free electron gas. Calculations are carried out by using distorted-wave methods. For hydrogen targets we employ the continuum-distorted-wave e...
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| Autores principales: | , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_10502947_v72_n4_p_Miraglia |
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| Sumario: | We calculate the nonlinear effects that appear at the level of the stopping cross section when heavy bare projectiles collide with both atomic hydrogen and a free electron gas. Calculations are carried out by using distorted-wave methods. For hydrogen targets we employ the continuum-distorted-wave eikonal initial-state approximation, while for the free electron gas we use the Coulomb-Lindhard approach. Results are compared with exact results for the quantum harmonic oscillator target. Ratios to the first-order stopping are analyzed in detail and their structures are interpreted in terms of Padé approximants. We also investigate the dependency of the stopping ratios on the impact parameter. © 2005 The American Physical Society. |
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