TRAX xs command
| GSI Biophysics | TRAX long write-up |

xs


xs   projectile target | interaction
   / prefix() 
     import() calculate list    enable  debug
     export() method()  delete  disable
     read     ne()      display 
     write    nw()      inspect
     swap     na()
              e()
              w()
              a()

Purpose

Handles interaction cross sections.

Parameters

projectile

Specifies projectile.

target

Specifies target material.

interaction

Specifies interactions. Supported are: i , l or x (ionization, elastic, excitation) for electrons, and i or x for ions.
Default is * (all supported ones).

prefix(prefix)

Output file name(s) prefix.

import()

Not yet implemented.

export(fmt)

Exports current cross sections in some other format. At present only fmt="gd" is foreseen, to be plotted with the gd program. Cross sections are exported as a couple of files for each material, comprising total as well as differential cross section tables.
File naming convention is:
<prefix><projectile>.<target>.<interaction>.gd,
for total cross sections and
<prefix><projectile>.<target>.<interaction>.<fff><eeeee>.gd,
for differential cross sections where <fff> is one of keV MeV GeV and <eeeee> is a five digit energy value, with the radix point after the third digit.

read

Not yet implemented.

write

Not yet implemented.

swap

Not yet implemented.

list

List current cross sections.

delete

Delete specified cross sections.

display

Not yet implemented.

inspect

Inspect specified cross sections.

enable

Emable specified cross sections.

disable

Disable specified cross sections.

calculate

Calculate specified cross sections.

method(m)

Method of calculation.
For electrons:
emp
For ions one of e.g.: If omitted the internal default is emp

ne()

Number of primary particle energy table values. If omitted a "reasonable" internal default is chosen.

nw()

Number of secondary particle energy table values. If omitted a "reasonable" internal default is chosen.

na()

Number of secondary angle table values. If omitted a "reasonable" internal default is chosen.

e()
Pair of numbers specifying lower and upper limit of primary particle energy table values. If omitted a "reasonable" internal default is chosen.

w()
Not yet implemented.

a()
Pair of numbers specifying lower and upper limit of secondary angle table values. If omitted a "reasonable" internal default is chosen.

debug

Debug switch. Lots of output !

Remark

Examples

xs C H2O i / calc export(gd) meth(bea) e(10)
calculates the ionization cross sections for C + H2O 10 MeV/u with the Binary Encounter Approximation. Data are exported to the files
C.H2O.MeV01000.i.gd
and
C.H2O.i.gd
respectively
| GSI Biophysics | TRAX long write-up |
Last updated: M.Kraemer@gsi.de, 19-Jan-2001