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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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19 | // * technical work of the GEANT4 collaboration. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4HyperNucleiProperties.cc,v 1.4 2008/10/22 12:35:46 kurasige Exp $ |
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27 | // GEANT4 tag $Name: $ |
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28 | // |
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29 | // ------------------------------------------------------------ |
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30 | // GEANT 4 class header file |
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31 | // |
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32 | // ------------------------------------------------------------ |
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33 | // Hyper Nuclei properties based on CHIPS model (Mikhail KOSOV) |
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34 | // Migrate into particles category by H.Kurashige (Sep. 2007) |
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35 | // |
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36 | #include "G4HyperNucleiProperties.hh" |
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37 | #include "G4NucleiProperties.hh" |
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38 | #include "G4ParticleTable.hh" |
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39 | |
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40 | |
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41 | G4double G4HyperNucleiProperties::GetNuclearMass(G4int A, G4int Z, G4int L) |
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42 | { |
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43 | if (L==0) return G4NucleiProperties::GetNuclearMass(A, Z); |
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44 | |
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45 | G4ParticleTable* pTable = G4ParticleTable::GetParticleTable(); |
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46 | if (A < 2 || Z < 0 || Z > A-L || L>A ) { |
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47 | #ifdef G4VERBOSE |
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48 | if (pTable->GetVerboseLevel()>0) { |
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49 | G4cout << "G4HyperNucleiProperties::GetNuclearMass: " |
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50 | << " Wrong values for A = " << A |
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51 | << " Z = " << Z |
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52 | << " L = " << L |
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53 | << G4endl; |
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54 | } |
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55 | #endif |
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56 | return 0.0; |
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57 | } else if( A==2 ) { |
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58 | #ifdef G4VERBOSE |
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59 | if (pTable->GetVerboseLevel()>0) { |
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60 | G4cout << "G4HyperNucleiProperties::GetNuclearMass: " |
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61 | << " No boud state for A = " << A |
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62 | << " Z = " << Z |
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63 | << " L = " << L |
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64 | << G4endl; |
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65 | } |
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66 | #endif |
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67 | return 0.0; |
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68 | } |
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69 | |
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70 | |
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71 | G4ParticleDefinition* lambda = pTable->FindParticle("lambda"); |
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72 | if (lambda ==0) { |
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73 | #ifdef G4VERBOSE |
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74 | if (pTable->GetVerboseLevel()>0) { |
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75 | G4cout << "G4HyperNucleiProperties::GetNuclearMass: " |
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76 | << " Lambda is not defined " << G4endl; |
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77 | } |
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78 | #endif |
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79 | return 0.0; |
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80 | } |
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81 | const G4double mL= lambda->GetPDGMass(); // mLambda |
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82 | |
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83 | static const G4double b7=25.*MeV; |
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84 | static const G4double b8=10.5; // Slope |
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85 | static const G4double a2=0.13*MeV; // BindingEnergy for d+Lambda(MeV) |
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86 | static const G4double a3=2.2*MeV; // BindingEnergy for (t/He3)+Lamb(MeV) |
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87 | static const G4double eps =0.0001*MeV; // security value (MeV) |
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88 | |
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89 | G4double mass = G4NucleiProperties::GetNuclearMass(A-L, Z); |
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90 | // A non-"strange" nucleus |
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91 | G4double bs=0.; |
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92 | if (A-L ==2) bs=a2; // for nnL,npL,ppL |
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93 | else if(A-L ==3) bs=a3; // for 3nL,2npL,n2pL,3pL |
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94 | else if(A-L >3) bs=b7*std::exp(-b8/(A-L+1.)); |
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95 | mass += L*(mL-bs) + eps; |
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96 | |
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97 | return mass; |
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98 | } |
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99 | |
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100 | |
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101 | G4double G4HyperNucleiProperties::GetAtomicMass(G4int A, G4int Z, G4int L) |
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102 | { |
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103 | if (A < 1 || Z < 0 || Z > A-L || L > A || L <0 ) { |
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104 | #ifdef G4VERBOSE |
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105 | if (G4ParticleTable::GetParticleTable()->GetVerboseLevel()>0) { |
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106 | G4cout << "G4HyperNucleiProperties::GetAtomicMass: " |
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107 | << " Wrong values for A = " << A |
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108 | << " Z = " << Z |
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109 | << " L = " << L << G4endl; |
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110 | } |
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111 | #endif |
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112 | return 0.0; |
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113 | |
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114 | } else { |
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115 | G4double nuclearMass = GetNuclearMass(A, Z, L); |
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116 | return nuclearMass + Z*electron_mass_c2 |
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117 | - 1.433e-5*MeV*std::pow(G4double(Z),2.39); |
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118 | } |
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119 | } |
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120 | |
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