Sm. Pimblott et al., MONTE-CARLO SIMULATION OF RANGE AND ENERGY DEPOSITION BY ELECTRONS INGASEOUS AND LIQUID WATER, Journal of physical chemistry, 100(20), 1996, pp. 8595-8606
A stochastic simulation method employing suitable experimentally based
cross sections has been developed for probing the spatial distributio
n of energy loss and the trajectory of 100 eV to 1 MeV electrons in ga
seous and liquid water. Elastic collisions and large-energy-loss inela
stic collisions strongly influence the passage of electrons such that
the separation between the initial and final (E = 25 eV) position is c
onsiderably smaller than the path length. At all energies, the mean ax
ial and the mean radial penetrations are somewhat similar, however, th
e former is strongly influenced by inelastic collisions and the latter
by elastic collisions. The effect of phase on the density-normalized
range is small for energetic electrons, but differences are apparant a
t the lowest energies, <2 keV. The spatial distribution of energy depo
sition shows a marked dependence on electron energy. The spatial depen
dence of radial energy deposition and dose distributions in the axial
and radial directions have been calculated.