PENELOPE 2003 - OECD Nuclear Energy Agency

196 Chapter 6. Structure and operation of the code system
>>>>>>>> Job properties
RESUME filename1.ext [Resume from this dump file, 18 characters]
DUMPTO filename2.ext
[Generate this dump file, 18 characters]
NSIMSH NTOT
[Desired number of simulated showers, max=2**31-1]
RSEED ISEED1,ISEED2 [Seeds of the random number generator]
TIME ITIME [Allotted simulation time, in sec]
....+....1....+....2....+....3....+....4....+....5....+....6....+....7..
The following listing describes the function of each of the keywords, the accompanying
data and their default values.
TITLE ... title of the job (up to 65 characters).
-- Default: none (the input file must start with this line)
Geometry definition list . . . begins with the line “GSTART” and ends with the line
“GEND--” (notice the two blanks). The only allowed keywords in the geometry
list are “GSTART”, “LAYER-”, “CENTRE”, “CYLIND” and “GEND--”. The line after
“GSTART” must be a “LAYER-” line. Each “LAYER-” line contains the z-coordinates
of its lower and upper limiting planes and is followed by a “CENTRE” line (optional)
and by one or several “CYLIND” lines, which contain the inner and outer radii of
the various concentric rings in the layer; empty layers are disregarded.
Layers must be defined in increasing order of heights, from bottom to top of the
structure. If the “CENTRE” line is not entered, cylinders are assumed to be centered
on the z-axis (XCEN = YCEN = 0.0). Cylinders have to be defined in increasing
radial order, from the centre to the periphery. The two lengths in each “LAYER-”
and “CYLIND” line must be entered in increasing order. The geometry definition
list can be debugged/visualized with the code gviewc (operable under Microsoft
Windows). Notice that gviewc reads the geometry directly from the PENCYL input
data file (i.e. the first line in the geometry definition file must be the “TITLE-”
line).
SKPAR ... kind of primary particle (1=electrons, 2=photons or 3=positrons).
-- Default: KPARP=1
SENERG ... for monoenergetic sources: initial energy SE0 of primary particles.
-- Default: SE0=1.0E6
SPECTR ... For sources with continuous (stepwise constant) energy spectra. Each
“SPECTR” line gives the lower end-point of an energy bin of the source spectrum
and the associated relative probability, integrated over the bin. Up to NSEM = 200
lines, in arbitrary order. The upper end of the spectrum is defined by entering a
line with the upper energy value and null probability.
-- Default: none
SEXTND ... For internal extended sources, this line defines an active body KL, KC (the
cylinder KC in layer KL) and its relative activity concentration, RELAC.
-- Default: none