Geant4  10.01.p03
G4alphaIonisation.cc
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26 // $Id: G4alphaIonisation.cc 84598 2014-10-17 07:39:15Z gcosmo $
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4alphaIonisation
34 //
35 // Author: Vladimir Ivanchenko
36 //
37 // Creation date: 28.10.2009 created from G4ionIonisation
38 //
39 // Modifications:
40 //
41 //
42 //
43 // -------------------------------------------------------------------
44 //
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47 
48 #include "G4alphaIonisation.hh"
49 
50 #include "G4PhysicalConstants.hh"
51 #include "G4SystemOfUnits.hh"
52 #include "G4Electron.hh"
53 #include "G4Alpha.hh"
54 #include "G4BraggIonModel.hh"
55 #include "G4BetheBlochModel.hh"
56 #include "G4UnitsTable.hh"
57 #include "G4LossTableManager.hh"
58 #include "G4IonFluctuations.hh"
60 #include "G4EmParameters.hh"
61 
62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
63 
64 using namespace std;
65 
67  : G4VEnergyLossProcess(name),
68  theParticle(0),
69  isInitialised(false)
70 {
71  G4Exception("G4alphaIonisation::G4alphaIonisation","em0007",JustWarning,
72  " The process is not ready for use - incorrect results are expected");
73  SetLinearLossLimit(0.02);
74  SetStepFunction(0.2, 0.01*mm);
76  mass = 0.0;
77  ratio = 0.0;
78  eth = 8*MeV;
79 }
80 
81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
82 
84 {}
85 
86 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
87 
89 {
90  return (!p.IsShortLived() &&
91  std::fabs(p.GetPDGCharge()/CLHEP::eplus - 2) < 0.01);
92 }
93 
94 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
95 
97  const G4Material*,
98  G4double cut)
99 {
100  G4double x = 0.5*cut/electron_mass_c2;
101  G4double gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio));
102  return mass*(gam - 1.0);
103 }
104 
105 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
106 
108  const G4ParticleDefinition* part,
109  const G4ParticleDefinition* bpart)
110 {
111  if(!isInitialised) {
112 
113  theParticle = part;
114  G4String pname = part->GetParticleName();
115 
116  // define base particle
117  const G4ParticleDefinition* theBaseParticle = 0;
118  if(bpart == 0) {
119  if(pname != "alpha") { theBaseParticle = G4Alpha::Alpha(); }
120  } else { theBaseParticle = bpart; }
121 
122  mass = part->GetPDGMass();
123  ratio = mass/electron_mass_c2/mass;
124 
125  SetBaseParticle(theBaseParticle);
127 
128  if (!EmModel(1)) { SetEmModel(new G4BraggIonModel(), 1); }
129 
131  G4double emin = param->MinKinEnergy();
132  EmModel(1)->SetLowEnergyLimit(emin);
133 
134  // model limit defined for alpha
135  eth = (EmModel(1)->HighEnergyLimit())*ratio;
137  AddEmModel(1, EmModel(1), new G4IonFluctuations());
138 
140 
141  if (!EmModel(2)) { SetEmModel(new G4BetheBlochModel(),2); }
144  AddEmModel(2, EmModel(2), FluctModel());
145 
146  isInitialised = true;
147  }
148 }
149 
150 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
151 
153 {}
154 
155 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
virtual G4double MinPrimaryEnergy(const G4ParticleDefinition *p, const G4Material *, G4double cut)
static const double MeV
Definition: G4SIunits.hh:193
G4double MaxKinEnergy() const
G4double HighEnergyLimit() const
Definition: G4VEmModel.hh:616
virtual void InitialiseEnergyLossProcess(const G4ParticleDefinition *, const G4ParticleDefinition *)
G4String name
Definition: TRTMaterials.hh:40
void SetLinearLossLimit(G4double val)
void SetStepFunction(G4double v1, G4double v2)
const G4ParticleDefinition * theParticle
void SetFluctModel(G4VEmFluctuationModel *)
virtual G4bool IsApplicable(const G4ParticleDefinition &p)
virtual void PrintInfo()
const G4String & GetParticleName() const
void SetHighEnergyLimit(G4double)
Definition: G4VEmModel.hh:707
G4VEmFluctuationModel * FluctModel()
bool G4bool
Definition: G4Types.hh:79
void SetProcessSubType(G4int)
Definition: G4VProcess.hh:432
void AddEmModel(G4int, G4VEmModel *, G4VEmFluctuationModel *fluc=0, const G4Region *region=0)
G4double MinKinEnergy() const
void SetSecondaryParticle(const G4ParticleDefinition *p)
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
Definition: G4Exception.cc:41
G4double GetPDGMass() const
static G4EmParameters * Instance()
void SetEmModel(G4VEmModel *, G4int index=1)
virtual ~G4alphaIonisation()
static G4Electron * Electron()
Definition: G4Electron.cc:94
static G4Alpha * Alpha()
Definition: G4Alpha.cc:89
double G4double
Definition: G4Types.hh:76
void SetLowEnergyLimit(G4double)
Definition: G4VEmModel.hh:714
static const double eplus
Definition: G4SIunits.hh:178
G4double GetPDGCharge() const
G4alphaIonisation(const G4String &name="alphaIoni")
static const double mm
Definition: G4SIunits.hh:102
void SetBaseParticle(const G4ParticleDefinition *p)
G4VEmModel * EmModel(G4int index=1) const