Geant4  10.01.p02
G4MuIonisation.cc
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26 // $Id: G4MuIonisation.cc 85023 2014-10-23 09:56:39Z gcosmo $
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4MuIonisation
34 //
35 // Author: Laszlo Urban
36 //
37 // Creation date: 30.09.1997
38 //
39 // Modifications:
40 //
41 // 08-04-98 remove 'tracking cut' of the ionizing particle (mma)
42 // 26-10-98 new stuff from R.Kokoulin + cleanup , L.Urban
43 // 10-02-00 modifications , new e.m. structure, L.Urban
44 // 23-03-01 R.Kokoulin's correction is commented out, L.Urban
45 // 29-05-01 V.Ivanchenko minor changes to provide ANSI -wall compilation
46 // 10-08-01 new methods Store/Retrieve PhysicsTable (mma)
47 // 28-08-01 new function ComputeRestrictedMeandEdx() + 'cleanup' (mma)
48 // 17-09-01 migration of Materials to pure STL (mma)
49 // 26-09-01 completion of RetrievePhysicsTable (mma)
50 // 29-10-01 all static functions no more inlined (mma)
51 // 07-11-01 correction(Tmax+xsection computation) L.Urban
52 // 08-11-01 particleMass becomes a local variable (mma)
53 // 10-05-02 V.Ivanchenko update to new design
54 // 04-12-02 V.Ivanchenko the low energy limit for Kokoulin model to 10 GeV
55 // 23-12-02 Change interface in order to move to cut per region (V.Ivanchenko)
56 // 26-12-02 Secondary production moved to derived classes (V.Ivanchenko)
57 // 13-02-03 SubCutoff regime is assigned to a region (V.Ivanchenko)
58 // 23-05-03 Define default integral + BohrFluctuations (V.Ivanchenko)
59 // 03-06-03 Add SetIntegral method to choose fluctuation model (V.Ivanchenko)
60 // 03-06-03 Fix initialisation problem for STD ionisation (V.Ivanchenko)
61 // 04-08-03 Set integral=false to be default (V.Ivanchenko)
62 // 08-08-03 STD substitute standard (V.Ivanchenko)
63 // 12-11-03 G4EnergyLossSTD -> G4EnergyLossProcess (V.Ivanchenko)
64 // 10-02-04 Calculation of radiative corrections using R.Kokoulin model (V.I.)
65 // 27-05-04 Set integral to be a default regime (V.Ivanchenko)
66 // 17-08-04 Utilise mu+ tables for mu- (V.Ivanchenko)
67 // 08-11-04 Migration to new interface of Store/Retrieve tables (V.Ivantchenko)
68 // 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
69 // 12-08-05 SetStepLimits(0.2, 0.1*mm) (mma)
70 // 02-09-05 SetStepLimits(0.2, 1*mm) (V.Ivantchenko)
71 // 12-08-05 SetStepLimits(0.2, 0.1*mm) + integral off (V.Ivantchenko)
72 // 10-01-06 SetStepLimits -> SetStepFunction (V.Ivantchenko)
73 //
74 // -------------------------------------------------------------------
75 //
76 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78 
79 #include "G4MuIonisation.hh"
80 #include "G4PhysicalConstants.hh"
81 #include "G4SystemOfUnits.hh"
82 #include "G4Electron.hh"
83 #include "G4MuonPlus.hh"
84 #include "G4MuonMinus.hh"
85 #include "G4BraggModel.hh"
86 #include "G4BetheBlochModel.hh"
87 #include "G4MuBetheBlochModel.hh"
89 #include "G4IonFluctuations.hh"
90 #include "G4BohrFluctuations.hh"
91 #include "G4UnitsTable.hh"
92 #include "G4ICRU73QOModel.hh"
93 #include "G4EmParameters.hh"
94 
95 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
96 
97 using namespace std;
98 
100  : G4VEnergyLossProcess(name),
101  theParticle(0),
102  theBaseParticle(0),
103  isInitialised(false)
104 {
105  mass = ratio = 0;
108 }
109 
110 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
111 
113 {}
114 
115 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
116 
118 {
119  return (p.GetPDGCharge() != 0.0 && p.GetPDGMass() > 10.0*MeV);
120 }
121 
122 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
123 
125  const G4Material*,
126  G4double cut)
127 {
128  G4double x = 0.5*cut/electron_mass_c2;
129  G4double gam = x*ratio + std::sqrt((1. + x)*(1. + x*ratio*ratio));
130  return mass*(gam - 1.0);
131 }
132 
133 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
134 
136  const G4ParticleDefinition* bpart)
137 {
138  if(!isInitialised) {
139 
140  theParticle = part;
141  theBaseParticle = bpart;
142 
145 
147  G4double elow = 0.2*MeV;
148  G4double emax = param->MaxKinEnergy();
149  G4double ehigh = std::min(1*GeV, emax);
150 
151  // Bragg peak model
152  if (!EmModel(1)) {
153  if(q > 0.0) { SetEmModel(new G4BraggModel(),1); }
154  else { SetEmModel(new G4ICRU73QOModel(),1); }
155  }
156  EmModel(1)->SetLowEnergyLimit(param->MinKinEnergy());
157  EmModel(1)->SetHighEnergyLimit(elow);
158  AddEmModel(1, EmModel(1), new G4IonFluctuations());
159 
160  // high energy fluctuation model
162 
163  // moderate energy model
164  if (!EmModel(2)) { SetEmModel(new G4BetheBlochModel(),2); }
165  EmModel(2)->SetLowEnergyLimit(elow);
166  EmModel(2)->SetHighEnergyLimit(ehigh);
167  AddEmModel(2, EmModel(2), FluctModel());
168 
169  // high energy model
170  if(ehigh < emax) {
171  if (!EmModel(3)) { SetEmModel(new G4MuBetheBlochModel(),3); }
172  EmModel(3)->SetLowEnergyLimit(ehigh);
173  EmModel(3)->SetHighEnergyLimit(emax);
174  AddEmModel(3, EmModel(3), FluctModel());
175  }
176  ratio = electron_mass_c2/mass;
177  isInitialised = true;
178  }
179 }
180 
181 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
182 
184 {}
185 
186 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
187 
188 
189 
190 
virtual ~G4MuIonisation()
static const double MeV
Definition: G4SIunits.hh:193
G4double MaxKinEnergy() const
G4String name
Definition: TRTMaterials.hh:40
void SetFluctModel(G4VEmFluctuationModel *)
G4MuIonisation(const G4String &name="muIoni")
void SetHighEnergyLimit(G4double)
Definition: G4VEmModel.hh:707
const G4ParticleDefinition * theParticle
G4VEmFluctuationModel * FluctModel()
virtual G4double MinPrimaryEnergy(const G4ParticleDefinition *p, const G4Material *, G4double cut)
bool G4bool
Definition: G4Types.hh:79
void SetProcessSubType(G4int)
Definition: G4VProcess.hh:432
static const double GeV
Definition: G4SIunits.hh:196
void AddEmModel(G4int, G4VEmModel *, G4VEmFluctuationModel *fluc=0, const G4Region *region=0)
G4double MinKinEnergy() const
void SetSecondaryParticle(const G4ParticleDefinition *p)
G4double GetPDGMass() const
const G4ParticleDefinition * theBaseParticle
static G4EmParameters * Instance()
void SetEmModel(G4VEmModel *, G4int index=1)
T min(const T t1, const T t2)
brief Return the smallest of the two arguments
virtual void InitialiseEnergyLossProcess(const G4ParticleDefinition *, const G4ParticleDefinition *)
static G4Electron * Electron()
Definition: G4Electron.cc:94
double G4double
Definition: G4Types.hh:76
void SetLowEnergyLimit(G4double)
Definition: G4VEmModel.hh:714
virtual G4bool IsApplicable(const G4ParticleDefinition &p)
G4double GetPDGCharge() const
virtual void PrintInfo()
G4VEmModel * EmModel(G4int index=1) const