THE EGS5 CODE SYSTEM

HATCH-call comes next
RAYLEIGH OPTION REQUESTED FOR MEDIUM NUMBER 1
EGS SUCCESSFULLY ’HATCHED’ FOR ONE MEDIUM.
Knock-on electrons can be created and any electron followed down to
0.010 MeV kinetic energy
Brem photons can be created and any photon followed down to
0.010 MeV
For
50.0 keV photons incident on 0.5cm of H2O with PCUT=0.010 MeV
Transmitted primaries= 88.89% ave energy= 0.050 MeV
Fraction Rayleigh scattering= 0.95% ave energy= 0.049 MeV
Fraction Compton scattering only= 8.60% ave energy= 0.046 MeV
3.6 Tutorial 6 (Program tutor6.f)
One of the important features of the EGS5 Code System is that the user has direct control over
the geometry in which the radiation transport takes place, and rather complex geometries can be
described in a very simple manner with the aid of geometry subprograms. Subroutine HOWFAR, in
the previous examples, was made more detailed than necessary for demonstration purposes. One
can greatly simplify things, particularly for the simple slab geometry case, as shown in the following
excerpts from tutor6.
!***********************************************************************
!
! **************
! * *
! * tutor6.f *
! * *
! **************
!
! An EGS5 user code. It lists the particles escaping from the back
! of a 1 mm Ta plate when a pencil beam of 20 MeV electrons
! is incident on it normally.
!
! NOTE: This program is the same as TUTOR1.f except that the
! geometry subroutine (HOWFAR) is simplified by the use of
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