INFN homepage
FLUKA: LOW-PWXS Previous Index Next

LOW-PWXS


    Sets the correspondence between the Fluka and the pointwise low energy neutron
    xsec materials

     
WHAT(1)
= isomer code of the target (Z x 10000 + A x 10 + m) Z, A, m, are the atomic, mass and isomer number of the isotope no default, a value < 0 resets the association to null If what(1) = 1.0, it is interpreted as to let FLUKA choose the corresponding pointwise cross ection data sets for all isotopes of the elements defined by what(4)-what(6)
WHAT(2)
= if > 0 a uniform grid data set is looked for, 0 (default) means non uniform grid data set, < 0 resets to default, actually 0 or < 0 behave the same. Warning: uniform grid data sets are not yet supported in the production version
WHAT(3)
= pointwise xsec temperature (def.=296, 0 is ignored, < 0 resets to default), actually 0 or < 0 behave the same
WHAT(4)
= from material "
WHAT(4)
" .... (def. 3)
WHAT(5)
= .... to material "
WHAT(5)
" .... (def.
WHAT(4)
)
WHAT(6)
= .... in step of "
WHAT(6)
" (def. 1) SDUM10 = extra character for the pointwise cross section file (default=blank) =1-H PWXS -> means the built-in 1-H pointwise cross sections (no external file needed) =2-H PWXS -> means the built-in 2-H pointwise cross sections (no external file needed) =3-HE PWXS -> means the built-in 3-He pointwise cross sections (no external file needed) =4-HE PWXS -> means the built-in 4-He pointwise cross sections (no external file needed) * Start_Devel_seq =6-LI PWXS -> means the built-in 6-Li pointwise cross sections (no external file needed) * End_Devel_seq =12-C PWXS -> means the built-in 12-C pointwise cross sections (no external file needed) The file name looked for by Fluka in the directory $FLUPRO/pwxs is composed as: <isomer code>(-<extra character if any>)(-uni)-<temp>.pwx where -uni is present if
WHAT(2)
> 0
Default
Notes:
1) If pointwise cross sections are requested for a compound the request is ignored. This card works only for elements, nevertheless it will silently ignore possible compounds included in the list defined by what(4)-what(6) 2) The list of available isotopes and temperatures, as well as of the originating evluated data file can be easily obtained looking in the $FLUPRO/pwxs directory Examples: 31P at 296 K from Endf/b-8r0:
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+...
LOW-PWXS 150310.0 296.0 P-31 P-31 endfb8r0 All isotopes for all materials at 296 K, leaving Fluka to decide which evaluations to pick up for each of them:
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+...
LOW-PWXS 1.0 3.0 @LASTMAT

Previous Index Next