Geant4  10.03
G4VCrossSectionSource.cc
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26 // $Id: G4VCrossSectionSource.cc,v 1.6 2010-03-12 15:45:18 gunter Exp $ //
27 //
28 
29 #include "globals.hh"
30 #include "G4SystemOfUnits.hh"
31 #include "G4HadronicException.hh"
32 #include "G4ios.hh"
33 #include "G4Pow.hh"
34 #include "G4VCrossSectionSource.hh"
35 #include "G4ParticleDefinition.hh"
36 #include "G4KineticTrack.hh"
37 #include "G4CrossSectionVector.hh"
39 #include "G4Proton.hh"
40 #include "G4Neutron.hh"
41 
43 { }
44 
45 
47 { }
48 
49 
51 FindKeyParticle(const G4KineticTrack& trk1,const G4KineticTrack& trk2) const
52 {
53  const G4ParticleDefinition * result;
54 
55  const G4ParticleDefinition * p1 = trk1.GetDefinition();
56  const G4ParticleDefinition * p2 = trk2.GetDefinition();
57 
58  if( (p1==G4Proton::Proton() && p2==G4Proton::Proton() ) ||
59  (p1==G4Neutron::Neutron() && p2==G4Neutron::Neutron()) )
60  {
61  result = G4Proton::Proton();
62  }
63  else if( (p1==G4Neutron::Neutron() && p2==G4Proton::Proton()) ||
64  (p2==G4Neutron::Neutron() && p1==G4Proton::Proton()) )
65  {
66  result = G4Neutron::Neutron();
67  }
68  else
69  {
70  throw G4HadronicException(__FILE__, __LINE__, "G4VCrossSectionSource: unklnown particles in FindKeyParticle");
71  }
72  return result;
73 }
74 
76 {
77  return (this == (G4VCrossSectionSource *) &right);
78 }
79 
80 
82 {
83  return (this != (G4VCrossSectionSource *) &right);
84 }
85 
86 
88 {
89  G4int nComponents = 0;
90  const G4CrossSectionVector* components = GetComponents();
91  if (components)
92  {
93  nComponents = components->size();
94  }
95  G4cout << "---- " << this->Name() << " ---- has " << nComponents << " components" <<G4endl;
96  G4int i;
97  for (i=0; i<nComponents; i++)
98  {
99  G4cout << "-" << this->Name() << " - Component " << i << ": " <<G4endl;
100 
101  G4CrossSectionSourcePtr componentPtr = (*components)[i];
102  G4VCrossSectionSource* component = componentPtr();
103  component->Print();
104  }
105 }
106 
107 
109 {
110  G4double sqrtS = (trk1.Get4Momentum() + trk2.Get4Momentum()).mag();
111  G4double sigma = CrossSection(trk1,trk2) / millibarn;
112  G4cout << "---- " << Name() << ": "
113  << "Ecm = " << sqrtS / GeV << " GeV - "
114  << " Cross section = " << sigma << " mb "
115  << G4endl;
116 
117  G4int nComponents = 0;
118  const G4CrossSectionVector* components = GetComponents();
119  if (components != 0)
120  {
121  nComponents = components->size();
122  }
123  G4int i;
124  for (i=0; i<nComponents; i++)
125  {
126  G4cout << "* Component " << i << ": ";
127  G4CrossSectionSourcePtr componentPtr = (*components)[i];
128  G4VCrossSectionSource* component = componentPtr();
129  component->PrintAll(trk1,trk2);
130  }
131 }
132 
133 
135 {
136  G4bool answer = false;
137  if (e >= eLow && e <= eHigh) answer = true;
138  return answer;
139 }
140 
142 {
143  return 0.;
144 }
145 
146 
148 {
149  return DBL_MAX;
150 }
151 
153 {
154  G4bool answer = false;
155  if (e >= LowLimit() && e <= HighLimit()) answer = true;
156  return answer;
157 }
158 
160  const G4KineticTrack& trk2) const
161 {
162  G4double mass1 = trk1.GetDefinition()->GetPDGMass();
163  G4double mass2 = trk2.GetDefinition()->GetPDGMass();
164  if (mass1 < mass2)
165  {
166  return trk1.GetDefinition();
167  }
168  else
169  {
170  return trk2.GetDefinition();
171  }
172 }
173 
174 
176  G4double sigma, G4double eParam, G4double power) const
177 {
178  G4double result = 0.;
179 
180  G4double denom = eParam*eParam + (e-e0)*(e-e0);
181  if (denom > 0.)
182  {
183  G4double value = (2.* eParam * sigma * (e-e0) / denom) * G4Pow::GetInstance()->powA(((e0 + eParam) / e), power);
184  result = std::max(0., value);
185  }
186  return result;
187 }
188 
189 
190 
191 
static G4Pow * GetInstance()
Definition: G4Pow.cc:55
G4double powA(G4double A, G4double y) const
Definition: G4Pow.hh:259
const G4ParticleDefinition * FindKeyParticle(const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
virtual G4String Name() const =0
virtual G4double LowLimit() const
G4double FcrossX(G4double e, G4double e0, G4double sigma, G4double eParam, G4double power) const
virtual G4double HighLimit() const
int G4int
Definition: G4Types.hh:78
virtual const G4CrossSectionVector * GetComponents() const =0
G4GLOB_DLL std::ostream G4cout
bool G4bool
Definition: G4Types.hh:79
static G4Proton * Proton()
Definition: G4Proton.cc:93
static G4Neutron * Neutron()
Definition: G4Neutron.cc:104
virtual G4bool IsValid(G4double e) const
std::vector< G4CrossSectionSourcePtr > G4CrossSectionVector
G4double GetPDGMass() const
G4bool operator!=(const G4VCrossSectionSource &right) const
T max(const T t1, const T t2)
brief Return the largest of the two arguments
G4bool operator==(const G4VCrossSectionSource &right) const
virtual void Print() const
static constexpr double GeV
Definition: G4SIunits.hh:217
#define G4endl
Definition: G4ios.hh:61
virtual void PrintAll(const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
double G4double
Definition: G4Types.hh:76
const G4LorentzVector & Get4Momentum() const
#define DBL_MAX
Definition: templates.hh:83
const G4ParticleDefinition * GetDefinition() const
const G4ParticleDefinition * FindLightParticle(const G4KineticTrack &trk1, const G4KineticTrack &trk2) const
static constexpr double millibarn
Definition: G4SIunits.hh:106
G4bool InLimits(G4double e, G4double eLow, G4double eHigh) const
virtual G4double CrossSection(const G4KineticTrack &trk1, const G4KineticTrack &trk2) const =0