PENELOPE 2003 - OECD Nuclear Energy Agency

6.2. Examples of MAIN programs 197
Note: The labels KL, KC that identify each body are defined by the ordering in the
input geometry list. These labels are written on the output geometry report.
STHICK ... For an external source, thickness (height) of the active volume of the
source (cylinder or ring).
-- Default: STHICK=0.0
SRADII ... inner and outer radii of the active source volume.
-- Defaults: SRIN=0.0, SROUT=0.0
SPOSIT ... coordinates of the centre of the source volume.
-- Defaults: SX0=SY0=0, SZ0=-1.0E15
SDIREC ... polar angle θ and azimuthal angle φ of the source beam axis direction, in
deg.
-- Defaults: STHETA=0.0, SPHI=0.0
SAPERT ... angular aperture α of the source beam, in deg.
-- Default: SALPHA=0.0
NMAT ... number of different materials (up to 10 with the original program dimensions).
Materials are identified by their ordering in penelope’s input material
data file.
-- Default: NMAT=1
SIMPAR ... set of simulation parameters for the M-th material; absorption energies,
EABS(1:3,M), elastic scattering parameters, C1(M) and C2(M), and cutoff energy
losses for inelastic collisions and bremsstrahlung emission, WCC(M) and WCR(M).
One line for each material.
-- Defaults: EABS(1,M)=EABS(3,M)=0.01*EPMAX, EABS(2,M)=0.001*EPMAX
C1(M)=C2(M)=0.1, WCC=EABS(1,M), WCR=EABS(2,M)
EPMAX is the maximum energy of all particles found in the simulation (depends on
the source energies).
PFNAME ... name of penelope’s input material data file (18 characters).
-- Default: ’material.mat’
NBE
... number of energy bins and limits of the interval where energy distributions
are tallied.
-- Defaults: NBE=100, EMIN=0.0, EMAX=EPMAX
NBTH ... number of bins for the polar angle θ.
-- Default: NBTH=90
NBPH ... number of bins for the azimuthal angle φ.
-- Default: NBPH=1 (azimuthal average).
NBZ
... number of bins for the z-coordinate.
-- Default: NBZ=100
NBR ... number of bins for the radial variable, r = (x 2 + y 2 ) 1/2 .
-- Default: NBR=100