source: trunk/source/processes/electromagnetic/standard/include/G4ICRU73QOModel.hh @ 1340

Last change on this file since 1340 was 1337, checked in by garnier, 14 years ago

tag geant4.9.4 beta 1 + modifs locales
File size: 8.1 KB
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25//
26// $Id: G4ICRU73QOModel.hh,v 1.3 2010/06/04 09:09:31 vnivanch Exp $
27// GEANT4 tag $Name: geant4-09-04-beta-01 $
28//
29// -------------------------------------------------------------------
30//
31// GEANT4 Class header file
32//
33//
34// File name:     G4ICRU73QOModel
35//
36// Author:        Alexander Bagulya
37//
38// Creation date: 21.05.2010
39//
40// Modifications:
41//
42//
43// Class Description:
44//
45// Quantum Harmonic Oscillator Model for energy loss using atomic shell
46// structure of atoms taking into account Q^2 (main for projectile charge Q),
47// Q^3 and Q^4 terms for computation of energy loss due to binary collisions.
48// Can be applied on heavy negatively charged particles for the energy interval
49// 10 keV - 10 MeV scaled to the proton mass.
50//
51// Used data and formula of
52// 1. G4QAOLowEnergyLoss class, S.Chauvie, P.Nieminen, M.G.Pia. IEEE Trans.
53//    Nucl. Sci. 54 (2007) 578.
54// 2. ShellStrength and ShellEnergy from ICRU'73 Report 2005,
55// 3. Data for Ta (Z=73) from P.Sigmund, A.Shinner. Eur. Phys. J. D15 (2001)
56//    165-172
57//
58// -------------------------------------------------------------------
59//
60
61#ifndef G4ICRU73QOModel_h
62#define G4ICRU73QOModel_h 1
63
64#include "G4VEmModel.hh"
65#include "G4AtomicShells.hh"
66#include "G4DensityEffectData.hh"
67
68class G4ParticleChangeForLoss;
69
70class G4ICRU73QOModel : public G4VEmModel
71{
72
73public:
74
75  G4ICRU73QOModel(const G4ParticleDefinition* p = 0,
76                  const G4String& nam = "ICRU73QO");
77
78  virtual ~G4ICRU73QOModel();
79
80  virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&);
81
82  virtual G4double MinEnergyCut(const G4ParticleDefinition*,
83                                const G4MaterialCutsCouple*);
84                       
85  virtual G4double ComputeCrossSectionPerElectron(
86                                 const G4ParticleDefinition*,
87                                 G4double kineticEnergy,
88                                 G4double cutEnergy,
89                                 G4double maxEnergy);
90                                 
91  virtual G4double ComputeCrossSectionPerAtom(
92                                 const G4ParticleDefinition*,
93                                 G4double kineticEnergy,
94                                 G4double Z, G4double A,
95                                 G4double cutEnergy,
96                                 G4double maxEnergy);
97                                                                 
98  virtual G4double CrossSectionPerVolume(const G4Material*,
99                                 const G4ParticleDefinition*,
100                                 G4double kineticEnergy,
101                                 G4double cutEnergy,
102                                 G4double maxEnergy);
103                                 
104  virtual G4double ComputeDEDXPerVolume(const G4Material*,
105                                        const G4ParticleDefinition*,
106                                        G4double kineticEnergy,
107                                        G4double);
108
109  virtual void SampleSecondaries(std::vector<G4DynamicParticle*>*,
110                                 const G4MaterialCutsCouple*,
111                                 const G4DynamicParticle*,
112                                 G4double tmin,
113                                 G4double maxEnergy);
114
115  // add correction to energy loss and compute non-ionizing energy loss
116  virtual void CorrectionsAlongStep(const G4MaterialCutsCouple*,
117                                    const G4DynamicParticle*,
118                                    G4double& eloss,
119                                    G4double& niel,
120                                    G4double length);
121
122protected:
123
124  virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
125                                      G4double kinEnergy);
126
127private:
128
129  inline void SetParticle(const G4ParticleDefinition* p);
130  inline void SetLowestKinEnergy(const G4double val);
131
132  G4double DEDX(const G4Material* material, G4double kineticEnergy);
133
134  G4double DEDXPerElement(G4int Z, G4double kineticEnergy);
135
136  // hide assignment operator
137  G4ICRU73QOModel & operator=(const  G4ICRU73QOModel &right);
138  G4ICRU73QOModel(const  G4ICRU73QOModel&);
139
140  const G4ParticleDefinition* particle;
141  G4ParticleDefinition*       theElectron;   
142  G4ParticleChangeForLoss*    fParticleChange;
143  G4DensityEffectData*        denEffData;
144
145  G4double mass;
146  G4double q;
147  G4double chargeSquare;
148  G4double massRate;
149  G4double ratio;
150  G4double lowestKinEnergy;
151
152  G4bool   isInitialised;
153
154  // get number of shell, energy and oscillator strenghts for material
155  G4int GetNumberOfShells(G4int Z) const;
156
157  G4double GetShellEnergy(G4int Z, G4int nbOfTheShell) const; 
158  G4double GetOscillatorEnergy(G4int Z, G4int nbOfTheShell) const; 
159  G4double GetShellStrength(G4int Z, G4int nbOfTheShell) const;
160
161  // calculate stopping number for L's term
162  G4double GetL0(G4double normEnergy) const;
163  // terms in Z^2
164  G4double GetL1(G4double normEnergy) const;
165  // terms in Z^3
166  G4double GetL2(G4double normEnergy) const;
167  // terms in Z^4
168 
169
170  // Z of element at now avaliable for the model
171  static const G4int NQOELEM  = 26;
172  static const G4int NQODATA  = 130;
173  static const G4int ZElementAvailable[NQOELEM];
174 
175  // number, energy and oscillator strenghts
176  // for an harmonic oscillator model of material
177  static const G4int startElemIndex[NQOELEM];
178  static const G4int nbofShellsForElement[NQOELEM];
179  static const G4double ShellEnergy[NQODATA];
180  static const G4double SubShellOccupation[NQODATA];  // Z * ShellStrength
181
182  G4int indexZ[100];
183
184  //  variable for calculation of stopping number of L's term
185  static const G4double L0[67][2];
186  static const G4double L1[22][2];
187  static const G4double L2[14][2];
188 
189  G4int sizeL0;
190  G4int sizeL1;
191  G4int sizeL2;
192
193  static const G4double factorBethe[99];
194 
195};
196
197//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
198
199inline void G4ICRU73QOModel::SetParticle(const G4ParticleDefinition* p)
200{
201  particle = p;
202  mass = particle->GetPDGMass();
203  q = particle->GetPDGCharge()/eplus;
204  chargeSquare = q*q;
205  massRate     = mass/proton_mass_c2;
206  ratio = electron_mass_c2/mass;
207}
208
209//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
210
211inline G4int G4ICRU73QOModel::GetNumberOfShells(G4int Z) const
212{
213  G4int nShell = 0;
214
215  if(indexZ[Z] >= 0) { nShell = nbofShellsForElement[indexZ[Z]]; 
216  } else { nShell = G4AtomicShells::GetNumberOfShells(Z); }
217
218  return nShell;
219}
220
221//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
222
223inline G4double G4ICRU73QOModel::GetShellEnergy(G4int Z,
224                                         G4int nbOfTheShell) const
225{
226  G4double shellEnergy = 0.;
227
228  G4int idx = indexZ[Z];
229
230  if(indexZ[Z] >= 0) { shellEnergy = ShellEnergy[startElemIndex[idx] + nbOfTheShell]*eV; 
231  } else { shellEnergy = GetOscillatorEnergy(Z, nbOfTheShell); }
232
233  return  shellEnergy;
234}
235
236//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
237
238inline G4double G4ICRU73QOModel::GetShellStrength(G4int Z,
239                                            G4int nbOfTheShell) const
240{
241  G4double shellStrength = 0.;
242
243  G4int idx = indexZ[Z];
244
245  if(indexZ[Z] >= 0) { shellStrength = SubShellOccupation[startElemIndex[idx] + nbOfTheShell] / Z; 
246} else { shellStrength = 1.0 / Z * G4AtomicShells::GetNumberOfElectrons(Z,nbOfTheShell); }
247 
248  return shellStrength;
249}
250
251//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
252
253inline void G4ICRU73QOModel::SetLowestKinEnergy(const G4double val)
254{
255  lowestKinEnergy = val;
256}
257
258#endif
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