Nonlinear energy-loss straggling of protons and antiprotons in an electron gas

Details Nonlinear energy-loss straggling of protons and antiprotons in an electron gas Nonlinear energy-loss straggling of protons and antiprotons in an electron gas

1998-04-22

arxiv.org/abs/cond-mat/9804247v1

Phys. Rev. A 57, 4053 (1998)

Physics

Condensed Matter

Materials Science

4 pages, 3 figures, to appear in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.57.4053

The electronic energy-loss straggling of protons and antiprotons moving at arbitrary nonrelativistic velocities in a homogeneous electron gas are evaluated within a quadratic response theory and the random-phase approximation (RPA). These results show that at low and intermediate velocities quadratic corrections reduce significantly the energy-loss straggling of antiprotons, these corrections being, at low-velocities, more important than in the evaluation of the stopping power.

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