TY - JOUR
T1 - Dynamical effects in the interaction of ion beams with solids
AU - Hatcher, Ryan
AU - Beck, Matthew
AU - Tackett, Alan
AU - Pantelides, Sokrates T.
PY - 2008/3/13
Y1 - 2008/3/13
N2 - Calculations of the stopping power (SP) of ion beams in solids have been based on a homogeneous electron gas scattering off a static atom and entail at least one free parameter. Here we report dynamical simulations of ions channeled in silicon. Time-dependent density-functional theory (TDDFT) is used. The calculated SPs are in excellent agreement with the observed oscillatory dependence on atomic number. TDDFT calculations for a homogeneous electron gas demonstrate that both dynamical response and nonuniformities in the electron density are essential to reproduce the data without free parameters.
AB - Calculations of the stopping power (SP) of ion beams in solids have been based on a homogeneous electron gas scattering off a static atom and entail at least one free parameter. Here we report dynamical simulations of ions channeled in silicon. Time-dependent density-functional theory (TDDFT) is used. The calculated SPs are in excellent agreement with the observed oscillatory dependence on atomic number. TDDFT calculations for a homogeneous electron gas demonstrate that both dynamical response and nonuniformities in the electron density are essential to reproduce the data without free parameters.
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U2 - 10.1103/PhysRevLett.100.103201
DO - 10.1103/PhysRevLett.100.103201
M3 - Article
AN - SCOPUS:40849118281
SN - 0031-9007
VL - 100
JO - Physical Review Letters
JF - Physical Review Letters
IS - 10
M1 - 103201
ER -