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25 // 25 //
26 // INCL++ intra-nuclear cascade model 26 // INCL++ intra-nuclear cascade model
27 // Alain Boudard, CEA-Saclay, France 27 // Alain Boudard, CEA-Saclay, France
28 // Joseph Cugnon, University of Liege, Belgium 28 // Joseph Cugnon, University of Liege, Belgium
29 // Jean-Christophe David, CEA-Saclay, France 29 // Jean-Christophe David, CEA-Saclay, France
30 // Pekka Kaitaniemi, CEA-Saclay, France, and H 30 // Pekka Kaitaniemi, CEA-Saclay, France, and Helsinki Institute of Physics, Finland
31 // Sylvie Leray, CEA-Saclay, France 31 // Sylvie Leray, CEA-Saclay, France
32 // Davide Mancusi, CEA-Saclay, France 32 // Davide Mancusi, CEA-Saclay, France
33 // 33 //
34 #define INCLXX_IN_GEANT4_MODE 1 34 #define INCLXX_IN_GEANT4_MODE 1
35 35
36 #include "globals.hh" 36 #include "globals.hh"
37 37
38 /** \file G4INCLDeJongSpin.cc 38 /** \file G4INCLDeJongSpin.cc
39 * \brief Simple class implementing De Jong's 39 * \brief Simple class implementing De Jong's spin model for nucleus-nucleus
40 * collisions 40 * collisions
41 * 41 *
42 * Reference: De Jong, Ignatyuk and Schmidt, N 42 * Reference: De Jong, Ignatyuk and Schmidt, Nucl. Phys. A613 (1997) 435-444.
43 * 43 *
44 * \date 2 April 2012 44 * \date 2 April 2012
45 * \author Davide Mancusi 45 * \author Davide Mancusi
46 */ 46 */
47 47
48 #include "G4INCLGlobals.hh" 48 #include "G4INCLGlobals.hh"
49 #include "G4INCLRandom.hh" 49 #include "G4INCLRandom.hh"
50 #include "G4INCLDeJongSpin.hh" 50 #include "G4INCLDeJongSpin.hh"
51 51
52 namespace G4INCL { 52 namespace G4INCL {
53 53
54 namespace DeJongSpin { 54 namespace DeJongSpin {
55 55
56 namespace { 56 namespace {
57 57
58 const G4double jzFactor = PhysicalConsta 58 const G4double jzFactor = PhysicalConstants::hcSquared * 0.16;
59 59
60 G4double getSpinCutoffParameter(const G4 60 G4double getSpinCutoffParameter(const G4int Ap, const G4int Af) {
61 const G4double jz2 = jzFactor * Math:: 61 const G4double jz2 = jzFactor * Math::pow23((G4double) Ap); // No deformation assumed
62 const G4double sigma = jz2 * Af*(Ap-Af 62 const G4double sigma = jz2 * Af*(Ap-Af)/((G4double)(Ap-1));
63 return std::sqrt(sigma); 63 return std::sqrt(sigma);
64 } 64 }
65 65
66 } 66 }
67 67
68 ThreeVector shoot(const G4int Ap, const G4 68 ThreeVector shoot(const G4int Ap, const G4int Af) {
69 return Random::gaussVector(getSpinCutoff 69 return Random::gaussVector(getSpinCutoffParameter(Ap, Af));
70 } 70 }
71 } 71 }
72 } 72 }
73 73