Geant4_10
G4alphaIonisation.cc
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26 // $Id: G4alphaIonisation.cc 66241 2012-12-13 18:34:42Z gunter $
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 //
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
46 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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 
61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
62 
63 using namespace std;
64 
66  : G4VEnergyLossProcess(name),
67  theParticle(0),
68  isInitialised(false)
69 {
70  G4Exception("G4alphaIonisation::G4alphaIonisation","em0007",JustWarning,
71  " The process is not ready for use - incorrect results are expected");
72  SetLinearLossLimit(0.02);
73  SetStepFunction(0.2, 0.01*mm);
74  // SetIntegral(true);
76  // SetVerboseLevel(1);
77  mass = 0.0;
78  ratio = 0.0;
79  eth = 8*MeV;
80 }
81 
82 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
83 
85 {}
86 
87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
88 
90 {
91  return (!p.IsShortLived() &&
92  std::fabs(p.GetPDGCharge()/CLHEP::eplus - 2) < 0.01);
93 }
94 
95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
96 
98  const G4Material*,
99  G4double cut)
100 {
101  G4double x = 0.5*cut/electron_mass_c2;
102  G4double gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio));
103  return mass*(gam - 1.0);
104 }
105 
106 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
107 
109  const G4ParticleDefinition* part,
110  const G4ParticleDefinition* bpart)
111 {
112  if(!isInitialised) {
113 
114  theParticle = part;
115  G4String pname = part->GetParticleName();
116 
117  // define base particle
118  const G4ParticleDefinition* theBaseParticle = 0;
119  if(bpart == 0) {
120  if(pname != "alpha") { theBaseParticle = G4Alpha::Alpha(); }
121  } else { theBaseParticle = bpart; }
122 
123  mass = part->GetPDGMass();
124  ratio = electron_mass_c2/mass;
125 
126  SetBaseParticle(theBaseParticle);
128 
129  if (!EmModel(1)) { SetEmModel(new G4BraggIonModel(), 1); }
131 
132  // model limit defined for alpha
133  eth = (EmModel(1)->HighEnergyLimit())*mass/proton_mass_c2;
134  EmModel(1)->SetHighEnergyLimit(eth);
135 
137  AddEmModel(1, EmModel(1), new G4IonFluctuations());
138 
139  if (!EmModel(2)) { SetEmModel(new G4BetheBlochModel(),2); }
140  EmModel(2)->SetLowEnergyLimit(eth);
142  AddEmModel(2, EmModel(2), FluctModel());
143 
144  isInitialised = true;
145  }
146 }
147 
148 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
149 
151 {}
152 
153 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
virtual G4double MinPrimaryEnergy(const G4ParticleDefinition *p, const G4Material *, G4double cut)
G4double HighEnergyLimit() const
Definition: G4VEmModel.hh:592
virtual void InitialiseEnergyLossProcess(const G4ParticleDefinition *, const G4ParticleDefinition *)
const char * p
Definition: xmltok.h:285
void SetLinearLossLimit(G4double val)
void SetStepFunction(G4double v1, G4double v2)
const XML_Char * name
Definition: expat.h:151
tuple x
Definition: test.py:50
void SetFluctModel(G4VEmFluctuationModel *)
virtual G4bool IsApplicable(const G4ParticleDefinition &p)
virtual void PrintInfo()
const G4String & GetParticleName() const
void SetHighEnergyLimit(G4double)
Definition: G4VEmModel.hh:683
G4VEmFluctuationModel * FluctModel()
bool G4bool
Definition: G4Types.hh:79
TString part[npart]
Definition: Style.C:32
void SetProcessSubType(G4int)
Definition: G4VProcess.hh:432
float proton_mass_c2
Definition: hepunit.py:275
float electron_mass_c2
Definition: hepunit.py:274
void AddEmModel(G4int, G4VEmModel *, G4VEmFluctuationModel *fluc=0, const G4Region *region=0)
void SetSecondaryParticle(const G4ParticleDefinition *p)
string pname
Definition: eplot.py:33
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
Definition: G4Exception.cc:41
G4double GetPDGMass() const
void SetEmModel(G4VEmModel *, G4int index=1)
G4double MinKinEnergy() const
virtual ~G4alphaIonisation()
G4double MaxKinEnergy() const
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:690
G4double GetPDGCharge() const
G4alphaIonisation(const G4String &name="alphaIoni")
void SetBaseParticle(const G4ParticleDefinition *p)
G4VEmModel * EmModel(G4int index=1) const