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// Copyright (c) 2006 The Regents of the University of California.
// All rights reserved.
// UCRL-CODE-224807
//
//
// $Id: G4SmpSpNubarData.cc,v 1.1 2007/05/30 01:01:23 dennis Exp $
//

#include "G4fissionEvent.hh"

#define nSPfissNubarIso 18

G4double G4fissionEvent::G4SmpSpNubarData(G4int isotope) {

/*
  Description
    Determine average number of neutrons from spontaneous fission for
        Th-232, 
        U-232, U-233, U-234, U-235, U-236, U-238
        Np-237, 
        Pu-239, Pu-240, Pu-241,  Pu-242
        Am-241, 
        Cm-242, Cm-244, 
        Bk-249,
        Cf-252
    Based on Ensslin's data.
    N. Ensslin, et.al., "Application Guide to Neutron Multiplicity Counting," 
    LA-13422-M (November 1998)
*/

/*
  Input
    iso          - isotope
  Output
    G4SmpSpNubarData - average number of neutrons
                     -1. is the isotope has 
                         no nubar data
*/
 
  G4int i;

  static G4int spzaid [nSPfissNubarIso] = {
      90232, 92232, 92233, 92234, 92235,
      92236, 92238, 93237, 94238, 94239,
      94240, 94241, 94242, 95241, 96242,
      96244, 97249, 98252 };
  static G4double spnubar [nSPfissNubarIso] = {
      2.14,  1.71, 1.76,  1.81, 1.86,
      1.91,  2.01, 2.05,  2.21, 2.16,
      2.156, 2.25, 2.145, 3.22, 2.54,
      2.72,  3.40, 3.757
      };

// Find nubar
  for (i=0; i<nSPfissNubarIso; i++) {
    if (isotope == spzaid[i]) {
      return spnubar[i];
    }
  }
// no nubar available for that isotope
  return -1.;
}