TRAX xs command
| GSI Biophysics
| TRAX long write-up
|
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.:
emp
for empirical
bea
for BEA
rudd
for Rudd's model
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