Stopping power of a finite-temperature electron gas for slow unit charges

Journal Article · Sat Jun 01 04:00:00 EDT 1991 · Physical Review, A; (USA)

DOI:https://doi.org/10.1103/PhysRevA.43.6038· OSTI ID:5662604

Nagy, I; Arnau, A; Echenique, P M ^[1]; Ladanyi, K ^[2]

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1. Departamento de Fisica de Materiales, Universidad del Pais Vasco, Apartado 1072, San Sebastian 20080 (Spain)
2. Institute for Theoretical Physics, Roland Eoetvoes University, H-1088 Budapest (Hungary)

The stopping power of protons and antiprotons moving at low velocities through a uniform temperature-dependent electron gas is calculated by making use of the momentum-transfer cross section. The screened scattering potential required is determined with the aid of a parametric dielectric function obtained from the linearized Thomas--Fermi--von Weizsaecker treatment for screening in extended systems. A nonperturbative constraint, provided by the nuclear-cusp condition for the total electron density at the position of the probe charge, is used to fix the parameter value. The temperature-dependent higher-order effect on the stopping power is discussed for metallic densities of the system, showing that first-order approximations are valid only asymptotically.

• OSTI ID: 5662604
• Journal Information: Physical Review, A; (USA), Journal Name: Physical Review, A; (USA) Vol. 43:11; ISSN 1050-2947; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTIBARYONS
ANTIMATTER
ANTINUCLEI
ANTINUCLEONS
ANTIPARTICLES
ANTIPROTONS
BARYONS
CHARGED-PARTICLE TRANSPORT
CROSS SECTIONS
ELECTRON GAS
ELEMENTARY PARTICLES
FERMIONS
FLUIDS
GASES
HADRONS
MATTER
MOMENTUM TRANSFER
NUCLEI
NUCLEONS
PROJECTILES
PROTONS
RADIATION TRANSPORT
SCREENING
STOPPING POWER