title: Molecular dynamics simulations of classical stopping power.
abstract: Molecular dynamics can provide very accurate tests of classical kinetic theory; for example, unambiguous comparisons can be made for classical particles interacting via a repulsive 1/r potential. The plasma stopping power problem, of great interest in its own right, provides an especially stringent test of a velocity-dependent transport property. We have performed large-scale (~10(4)-10(6) particles) molecular dynamics simulations of charged-particle stopping in a classical electron gas that span the weak to moderately strong intratarget coupling regimes. Projectile-target coupling is varied with projectile charge and velocity. Comparisons are made with disparate kinetic theories (both Boltzmann and Lenard-Balescu classes) and fully convergent theories to establish regimes of validity. We extend these various stopping models to improve agreement with the MD data and provide a useful fit to our results.
authors: Computational Physics and Methods Group, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors: Paul E
authors: PE
authors: Grabowski
authors: Michael P
authors: MP
authors: Surh
authors: David F
authors: DF
authors: Richards
authors: Frank R
authors: FR
authors: Graziani
authors: Michael S
authors: MS
authors: Murillo