Low Energy Electromagnetic models data files
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    *********************************************************************
    * DATA ARE *NOT* FOR COMMERCIAL USE AND MUST BE USED WITHIN GEANT4  *
    *********************************************************************

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Directory Description
=====================

*** Photon processes ***

compton effect (comp):

   ce-cs-NN.dat      = integral cross sections    (EPDL97)
   ce-sf-NN.dat      = scattering functions       (EPDL97)

gamma conversion (pair): pair + triplet production, interpolated and summed

   pp-cs-NN.dat      = integral cross sections    (EPDL97)

gamma conversion (pairdata): pair production

   pp-pair-cs-NN.dat = integral cross sections    (EPDL97)

gamma conversion (tripdata ): triplet production

   pp-trip-cs-NN.dat = integral cross sections    (EPDL97)

photoelectric effect (phot): 
 
   pe-cs-NN.dat      = integral cross sections    (EPDL97) 
   pe-ss-cs-NN.dat   = subshell cross sections    (EPDL97)

rayleigh effect (comp):

   re-cs-NN.dat      = integral cross sections    (EPDL97)
   re-ff-NN.dat      = form factors               (EPDL97)


*** Electron processes ***

bremstrahlung (brem):

   br-cs-NN.dat      = integral cross sections                        (EEDL)   
   br-co-a.dat       = photon energy spectrum formula coefficient     (EEDL)  (+)
   br-co-b.dat       = photon energy spectrum formula coefficient     (EEDL)  (+)

ionisation (ioni):

   ion-ss-cs-NN.dat   = subshell cross sections
   ion-co-NN.dat      = delta ray energy spectrum formula coefficient (EEDL)  (+)
   io-co-NN.dat       = delta ray energy spectrum formula coefficient (EEDL)  (+)

coefficient for ionisation are obtained fitting delta ray spectrum with two functions

   * ion-co-NN.dat structure 

		column     type of data

		  1         incoming electron energy

                 2-7        first formula coefficients sum_i(A_i/(Energy+Binding)^i)

                  8         second formula coefficient  C_i/Energy^2

                  9         maximum of the rejection part of the first formula: 
                            sum_i(A_i/(Energy+Binding)^(i-1))

                10-11       subarea1 and subarea2 covered by the two formulas

		 12         separation cut 	    			

   * io-co-NN.dat structure (new fits with up to three functions)

		column     type of data

		  1         incoming electron energy

                 2-7        first formula coefficients sum_i(A_i/(Energy+Binding)^i) i=2,7

                  8         maximum of the rejection part of the first formula: 
                            sum_i(A_i/(Energy+Binding)^(i-1))

                 9-12       third formula coefficients sum_i(A_i/(Energy+Binding)^i) i=2,5

                 13         maximum of the rejection part of the first formula: 
                            sum_i(A_i/(Energy+Binding)^(i-1))

		14-15       second formula coefficient: C1*Energy^C2 

		 16         1st separation cut 	    			

		 17         2nd separation cut 	    			

each set of data in a file corresponding to subshells is separated by a line of -1.
The order of the functions 1st,2nd,3rd follows the increasing energy in which they are used
even if the second formula is the less used. (see Physics Reference Manual)
   
*** Atomic relaxation ***

fluorescence (fluor):

   fl-tr-pr-NN.dat   = radiative transition probabilities             (EADL)
   binding.dat       = binding energies                               (EADL)  

auger effect (auger):
   au-tr-pr-NN.dat   = non-radiative transition probabilities         (EADL)

* NN = ATOMIC NUMBER

*** Geant4-DNA processes ***

All cross section data files are located in the dna directory.

Please refer to http://geant4-dna.org for more details and publications.

*** PIXE data files ***

All cross section data files needed for PIXE with protons and alphas are stored in the
ecpssr, uf, kpcsPaul and kacsPaul directories located in the pixe directory.

Data in the pixe/ecpssr subdirectory are derived from the work of :

- A. Taborda et al.,
"Polynomial approximation to universal ionisation cross-sections of K and L shells induced by H and He ion beams"
Published in X-Ray Spectrom. 2011, 40, 127-134

- A. Taborda et al.,
"Polynomial approximation to universal M-shell ionisation cross sections"
To be published. (2012)
 
*** Ion processes ***

ionization (ion_stopping_data/icru73):
 
   zZZ_MAT.dat       = mass stopping powers from ICRU 73 tables and revised
                       tables provided by P. Sigmund/Univ. of Southern Denmark
                       (revised tables are: G4_WATER (all considered ions), 
                       G4_WATER_VAPOR (all considered ions), G4NYLON-6-6
                       (F ions), G4_Cu (all considered ions))

                       File name definition:
                         * Elemental targets: zZZ_YY.dat
                                               ZZ = ion atomic number
                                               YY = atomic number of material
                         * Compound materials: zZZ_NAME.dat
                                               ZZ = ion atomic number
                                               YY = material name 

                       File content:
                         Format readable by G4LPhysicsFreeVector, data in
                         ICRU 73 units:
                           1st column: Energy per nucleon in MeV
                           2nd column: Mass stopping power in MeV*cm2/(mg)

*** Seltzer-Berger data for bremsstrahlung cross section ***
    Atom. Data and Nucl. Data Tables 35 (1986) 345-418

bremsstarhlung (brem_SB):
 
   brZZ       = cross sections per element (Z=1-100) in a format of 2-D
                vector which can directly retrieved by G4Physics2DVector
                class; 

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Photoelectric Angular Majorant Surface Directory Description

photoelectric angular majorant surface distribution (photoelectric_angular)

ftab0.dat <- Majorant surface distribution for K-shell
ftab1.dat <- Majorant surface distribution for L-shells

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The cited Livermore data libraries are:

-- EPDL97  Evaluated Photon Data Library 
-- EEDL    Evaluated Electron Data Library 
-- EADL    Evaluated Atom Data Library

(see http://www.llnl.gov/cullen1/)

-- The data have been reformatted for usage in Geant4 and the files(+) 
contain values resulting from fitting the original data. 

