&GAS: SRIM

file

Name of the file which contains the SRIM table.

The energy range of the table should at least extend up to the kinetic energy of the incoming particle, and should extend as far down as SRIM will allow so as to simulate the final absorption. The Garfield interface extrapolates to higher and lower energies by taking resp. the last and first tabulated values.

The file for \α particles traversing a mixture of He and CF\<SUB\>4\</SUB\> would look as follows:

 ==================================================================
              Calculation using SRIM-2003
              SRIM version ---> SRIM-2003.26
              Calc. date   ---> October 24, 2005
 ==================================================================

 Disk File Name = SRIM Outputs\\Helium in He- C- F

 Ion = Helium [2] , Mass = 4.003 amu

 Target Density =  1.9000E-03 g/cm3 = 1.1026E+20 atoms/cm3
 ======= Target  Composition ========
    Atom   Atom   Atomic    Mass
    Name   Numb   Percent   Percent
    ----   ----   -------   -------
     He      2    053.12    020.49
      C      6    009.38    010.86
      F      9    037.50    068.65
 ====================================
 Bragg Correction = 0.00%
 Stopping Units =  MeV / (mg/cm2)
 See bottom of Table for other Stopping units

   Ion        dE/dx      dE/dx     Projected  Longitudinal   Lateral
  Energy      Elec.      Nuclear     Range     Straggling   Straggling
-----------  ---------- ---------- ----------  ----------  ----------
  10.00 keV   2.629E-01  6.037E-02  128.41 um    52.40 um    46.05 um
  11.00 keV   2.760E-01  5.715E-02  140.80 um    55.57 um    49.42 um
  12.00 keV   2.885E-01  5.431E-02  153.00 um    58.53 um    52.63 um
(...)
   7.00 MeV   5.985E-01  3.596E-04   39.51 mm     1.44 mm   790.64 um
   8.00 MeV   5.416E-01  3.196E-04   48.75 mm     1.96 mm   931.02 um
   9.00 MeV   5.000E-01  2.879E-04   58.85 mm     2.44 mm     1.09 mm
  10.00 MeV   4.604E-01  2.622E-04   69.81 mm     2.91 mm     1.25 mm
-----------------------------------------------------------
 Multiply Stopping by        for Stopping Units
 -------------------        ------------------
  1.8999E-02                 eV / Angstrom
  1.8999E-01                keV / micron
  1.8999E-01                MeV / mm
  1.0000E+00                keV / (ug/cm2)
  1.0000E+00                MeV / (mg/cm2)
  1.0000E+03                keV / (mg/cm2)
  1.7231E+01                 eV / (1E15 atoms/cm2)
  1.5537E+00                L.S.S. reduced units
 ==================================================================
 (C) 1984,1989,1992,1998,2003 by J.P. Biersack and J.F. Ziegler

Recipe to be provided ... Berta !

[No default; mandatory argument.]

work

Asymptotic (i.e. high energy) electromagnetic energy loss needed to produce a single electron, expressed in eV.

The work function depends on the gas and is typically a factor 2 larger than the ionisation energy.

[No default; mandatory argument.]

fano

Asymptotic (i.e. high energy) Fano factor for the production of electrons.

The Fano factor equals the RMS\²/average of the number of electrons produced by a given amount of electromagnetic energy. The factor depends on the electromagnetic energy - it tends to decrease from 1 at threshold to the asymptotic value which needs to be specified.

If set to NONE (or 0), the energy used for an electron will be equal to the work function, without fluctuations.

[By default: 0.17.]

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Formatted on 21/01/18 at 16:55.