23-V - 0

 23-V -  0 LLNL       EVAL-Dec89 D.E.Cullen                       
UCRL-50400,Vol.31     DIST-MAY10                       20100228   
----JENDL-4.0         MATERIAL 2300                               
-----ELECTRO-ATOMIC INTERACTION DATA                              
------ENDF-6 FORMAT                                               
 The data were taken from EEDL.                                   
The Livermore Evaluated Electron Data Library (EEDL) in the       
ENDF-6 Format. Translated from the Livermore ENDL format          
to the ENDF-6 Format by Bob MacFarlane (Los Alamos).              
  MF/MT    Description                                            
  23/526   Elastic Scattering Cross Sections                      
  23/527   Bremsstrahlung Cross Sections                          
  23/528   Excitation Cross Sections                              
  23/534   K (1S1/2)    Electroionization Subshell Cross Sections 
  23/535   L1 (2s1/2)   Electroionization Subshell Cross Sections 
  23/536   L2 (2p1/2)   Electroionization Subshell Cross Sections 
  23/537   L3 (2p3/2)   Electroionization Subshell Cross Sections 
  23/538   M1 (3s1/2)   Electroionization Subshell Cross Sections 
  23/539   M2 (3p1/2)   Electroionization Subshell Cross Sections 
  23/540   M3 (3p3/2)   Electroionization Subshell Cross Sections 
  23/541   M4 (3d3/2)   Electroionization Subshell Cross Sections 
  23/542   M5 (3d5/2)   Electroionization Subshell Cross Sections 
  23/543   N1 (4s1/2)   Electroionization Subshell Cross Sections 
  26/526   Elastic Scattering Angular Distributions               
  26/527   Bremsstrahlung Photon Energy Spectra and               
                          Electron Average Energy Loss            
  26/528   Excitation Electron Average Energy Loss                
  26/534   K (1S1/2)    Electroionization Subshell Energy Spectra 
  26/535   L1 (2s1/2)   Electroionization Subshell Energy Spectra 
  26/536   L2 (2p1/2)   Electroionization Subshell Energy Spectra 
  26/537   L3 (2p3/2)   Electroionization Subshell Energy Spectra 
  26/538   M1 (3s1/2)   Electroionization Subshell Energy Spectra 
  26/539   M2 (3p1/2)   Electroionization Subshell Energy Spectra 
  26/540   M3 (3p3/2)   Electroionization Subshell Energy Spectra 
  26/541   M4 (3d3/2)   Electroionization Subshell Energy Spectra 
  26/542   M5 (3d5/2)   Electroionization Subshell Energy Spectra 
  26/543   N1 (4s1/2)   Electroionization Subshell Energy Spectra 
  MF/MT combinations used to define ALL electron interaction data 
  are newly defined MF/MT numbers for ENDF/B-VI that did not exist
  in earlier versions of ENDF/B.                                  
  Definition of Data                                              
  Cross Sections (MF=23)                                          
1) The total electron interaction cross section is not given      
   explicitly; it is equal to the sum of the elastic scatter,     
   bremsstrahlung, excitation, and ionization cross sections,     
   i.e., MT = 526, 527, 528, and 534 through 572.                 
2) The total electroionization cross section is not given         
   explicitly; it is equal to the sum of the electroionization    
   subshell cross sections, i.e., all MT = 534 through 572.       
  Angular and Energy Distributions (MF=26)                        
3) For Elastic Scattering, the angular distribution of scattered  
   electrons is tabulated between cosine = -1.0 and +0.999999.    
   Between +0.999999 and +1.0 it is analytically defined as       
   Coulomb scattering,                                            
   d[Sig]/d(Cos) = A/[eta+(1.0 - Cos)]^2                          
   where the shielding parameter (eta) is defined by Steve        
   Seltzer's expression (see, ref. 1), and the normalization (A)  
   is defined for continuity with the tabulated data at Cos =     
   +0.999999. Electron "elastic" scattering means no energy       
   loss, so only angular distributions are given.                 
4) For bremsstrahlung, both the outgoing electron and photon are  
   described. The photon energy spectra are given, but angular    
   distributions are not; these can be analytically defined by a  
   number of different methods. For the electron, average energy  
   loss is given. The electron is assumed to continue along its   
   original direction of travel, so angular distributions are not 
   given. WARNING - bremsstrahlung is a three body process,       
   involving an electron, a photon, and an atom - so that you     
   cannot use energy or momentum correlation to simply relate     
   the secondary electron and the emitted photon.                 
5) For excitation, the average energy loss of the electron is     
   given. The electron is assumed to continue along its original  
   direction of travel, so angular distributions are not given.   
6) For Ionization, the spectra of electrons is given. The electron
   is assumed to continue along its original direction of travel, 
   so angular distributions are not given. In ionization two      
   identical electrons emerge; the incident electron, and an      
   electron ejected by the atom [thereby ionizing the atom]. Since
   the two particles are indistinquishable, we define the electron
   with the lower energy to be that ejected by the atom, and the  
   electron with the higher energy to be the incident electron.   
   The energy of the two electrons is exactly correlated by energy
   conservation: initial incident electron energy = binding energy
   of the ejected electron, plus the kinetic energy of the ejected
   and the secondary incident electron. Therefore only the spectra
   of the lower energy, ejected electron is given. The energy of  
   the secondary incident electron should be defined to conserve  
   energy, as described above. The energy lost by the incident    
   electron is the sum of the binding and kinetic energy of the   
   ejected electron.                                              
7) Relaxation of ionized atoms back to neutrality is not described
   here; it is described in the companion Evaluated Atomic Data   
   Library (EADL).                                                
1) S.T. Perkins, D.E. Cullen, and S.M. Seltzer, "Tables and       
   Graphs of Electron-Interaction Cross Sections from 10 eV to    
   100 GeV Derived from the LLNL Evaluated Electron Data          
   Library (EEDL), Z = 1-100, UCRL-50400, Vol. 31, Lawrence       
   Livermore National Laboratory (1991).                          
2) D.E. Cullen "PROGRAM EPICSHOW: A Computer Code to Allow        
   Interactive Viewing of the EPIC Data Libraries" (Version       
   2000-1), UCRL-ID-1264455, Rev. 3, Part 4, Lawrence Livermore   
   National Laboratory (2000).                                    
  These are the primary references to the contents of this library
  and they contains a complete list of references to the sources  
  of data used in this library, methods of evaluation, accuracy   
  of the data, etc.                                               
 (1) November, 1991 - Initial release in the ENDL format.         
 (2) October,  2001 - Initial release in the ENDF-6 format.