  Classical molecular-dynamics simulations (CMDS) have been conducted to
investigate one of the main mechanism responsible for absorption of radiation
by matter namely stimulated inverse bremsstrahlung. CMDS of two components
plasmas (electrons and ions) for a large range of electron densities, electron
temperatures, for ionization $Z=1$, were carried out with 2 million particles
using the code LAMMPS. A parameterized model (with 6 adjustable constants),
which encompasses most theoretical models proposed in the past to quantify
heating rate by stimulated inverse bremsstrahlung, serves as a reference for
comparison to our simulations. CMDS results are precise enough to rule out
elements of these past models such as coulomb logarithms depending solely upon
laser pulsation $\omega$ and not upon intensity. The 6 constants of the
parameterized model have been adjusted and the resulting model matches all our
CMDS results and those of previous CMDS in the literature.
