Maximum electron energy CSDA
range in liquid water
1.00E+00
1 .00E-01
-*RCSDA range of max. energy e-
1.00E-02
Thickness where 1% att.
Y ~ IThickness where 2% att.
S1.00E-03
_c: Thickness where 3% att.
-*-Thickness where 5% att
1.00E-04
1.00E-02 1.00E-01 1.00E+00 1.00E+01
Energy(MeV)
-1. Comparison between thicknesses required to attenuate different percentages of
primary photons and Rcsn range for maximum energy secondary electrons
produced by the same beam
i~-
-*-Ave.range of rnax. energy e-
-.Range where% atten.
Range where 2% atten.
Range where 3% atten.
- Range where 5% atten.
Figure 1-2. Comparison between thicknesses required to attenuate different percentage of
primary photons and average range for maximum energy secondary electrons
produced by the same beam
With proper model discretization of the angle-energy-spatial transport phase space, and at
low photon energies yielding primary and secondary electron interactions with small electron
Figure 1
Average range of maximum energy
electron in liquid water
EE
E 1.00E-03
a
2 1.00E-04
o 1.0E0
cn0
0OE-02
1.00E-01 1.00E+00
Energy (MeV)
1.00E+01