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G4PixeCrossSectionHandler Class Reference

#include <G4PixeCrossSectionHandler.hh>

Public Member Functions

 G4PixeCrossSectionHandler ()
 
 G4PixeCrossSectionHandler (G4IInterpolator *interpolation, const G4String &modelK="ecpssr", const G4String &modelL="ecpssr", const G4String &modelM="ecpssr", G4double minE=1 *CLHEP::keV, G4double maxE=0.1 *CLHEP::GeV, G4int nBins=200, G4double unitE=CLHEP::MeV, G4double unitData=CLHEP::barn, G4int minZ=6, G4int maxZ=92)
 
virtual ~G4PixeCrossSectionHandler ()
 
void Initialise (G4IInterpolator *interpolation, const G4String &modelK="ecpssr", const G4String &modelL="ecpssr", const G4String &modelM="ecpssr", G4double minE=1 *CLHEP::keV, G4double maxE=0.1 *CLHEP::GeV, G4int nBins=200, G4double unitE=CLHEP::MeV, G4double unitData=CLHEP::barn, G4int minZ=6, G4int maxZ=92)
 
G4int SelectRandomAtom (const G4Material *material, G4double e) const
 
G4int SelectRandomShell (G4int Z, G4double e) const
 
G4double FindValue (G4int Z, G4double e) const
 
G4double FindValue (G4int Z, G4double e, G4int shellIndex) const
 
G4double ValueForMaterial (const G4Material *material, G4double e) const
 
void LoadShellData (const G4String &dataFile)
 
G4double MicroscopicCrossSection (const G4ParticleDefinition *particleDef, G4double kineticEnergy, G4double Z, G4double deltaCut) const
 
void PrintData () const
 
void Clear ()
 

Detailed Description

Definition at line 60 of file G4PixeCrossSectionHandler.hh.

Constructor & Destructor Documentation

G4PixeCrossSectionHandler::G4PixeCrossSectionHandler ( )

Definition at line 61 of file G4PixeCrossSectionHandler.cc.

62 {
63  crossSections = 0;
64  interpolation = 0;
65  // Initialise with default values
66  Initialise(0,"","","",1.*keV,0.1*GeV,200,MeV,barn,6,92);
67  ActiveElements();
68 }
void Initialise(G4IInterpolator *interpolation, const G4String &modelK="ecpssr", const G4String &modelL="ecpssr", const G4String &modelM="ecpssr", G4double minE=1 *CLHEP::keV, G4double maxE=0.1 *CLHEP::GeV, G4int nBins=200, G4double unitE=CLHEP::MeV, G4double unitData=CLHEP::barn, G4int minZ=6, G4int maxZ=92)
static constexpr double GeV
Definition: G4SIunits.hh:217
static constexpr double MeV
Definition: G4SIunits.hh:214
static constexpr double barn
Definition: G4SIunits.hh:105
static constexpr double keV
Definition: G4SIunits.hh:216

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G4PixeCrossSectionHandler::G4PixeCrossSectionHandler ( G4IInterpolator interpolation,
const G4String modelK = "ecpssr",
const G4String modelL = "ecpssr",
const G4String modelM = "ecpssr",
G4double  minE = 1*CLHEP::keV,
G4double  maxE = 0.1*CLHEP::GeV,
G4int  nBins = 200,
G4double  unitE = CLHEP::MeV,
G4double  unitData = CLHEP::barn,
G4int  minZ = 6,
G4int  maxZ = 92 
)

Definition at line 71 of file G4PixeCrossSectionHandler.cc.

82  : interpolation(algorithm), eMin(minE), eMax(maxE), nBins(bins),
83  unit1(unitE), unit2(unitData), zMin(minZ), zMax(maxZ)
84 {
85  crossSections = 0;
86 
87  crossModel.push_back(modelK);
88  crossModel.push_back(modelL);
89  crossModel.push_back(modelM);
90 
91  //std::cout << "PixeCrossSectionHandler constructor - crossModel[0] = "
92  // << crossModel[0]
93  // << std::endl;
94 
95  ActiveElements();
96 }
G4PixeCrossSectionHandler::~G4PixeCrossSectionHandler ( )
virtual

Definition at line 98 of file G4PixeCrossSectionHandler.cc.

99 {
100  delete interpolation;
101  interpolation = 0;
102  std::map<G4int,G4IDataSet*,std::less<G4int> >::iterator pos;
103 
104  for (pos = dataMap.begin(); pos != dataMap.end(); ++pos)
105  {
106  // The following is a workaround for STL ObjectSpace implementation,
107  // which does not support the standard and does not accept
108  // the syntax pos->second
109  // G4IDataSet* dataSet = pos->second;
110  G4IDataSet* dataSet = (*pos).second;
111  delete dataSet;
112  }
113 
114  if (crossSections != 0)
115  {
116  size_t n = crossSections->size();
117  for (size_t i=0; i<n; i++)
118  {
119  delete (*crossSections)[i];
120  }
121  delete crossSections;
122  crossSections = 0;
123  }
124 }
static const G4double pos

Member Function Documentation

void G4PixeCrossSectionHandler::Clear ( )

Definition at line 210 of file G4PixeCrossSectionHandler.cc.

211 {
212  // Reset the map of data sets: remove the data sets from the map
213  std::map<G4int,G4IDataSet*,std::less<G4int> >::iterator pos;
214 
215  if(! dataMap.empty())
216  {
217  for (pos = dataMap.begin(); pos != dataMap.end(); ++pos)
218  {
219  // The following is a workaround for STL ObjectSpace implementation,
220  // which does not support the standard and does not accept
221  // the syntax pos->first or pos->second
222  // G4IDataSet* dataSet = pos->second;
223  G4IDataSet* dataSet = (*pos).second;
224  delete dataSet;
225  dataSet = 0;
226  G4int i = (*pos).first;
227  dataMap[i] = 0;
228  }
229  dataMap.clear();
230  }
231 
232  activeZ.clear();
233  ActiveElements();
234 }
int G4int
Definition: G4Types.hh:78
static const G4double pos
G4double G4PixeCrossSectionHandler::FindValue ( G4int  Z,
G4double  e 
) const

Definition at line 236 of file G4PixeCrossSectionHandler.cc.

237 {
238  G4double value = 0.;
239 
240  std::map<G4int,G4IDataSet*,std::less<G4int> >::const_iterator pos;
241  pos = dataMap.find(Z);
242  if (pos!= dataMap.end())
243  {
244  // The following is a workaround for STL ObjectSpace implementation,
245  // which does not support the standard and does not accept
246  // the syntax pos->first or pos->second
247  // G4IDataSet* dataSet = pos->second;
248  G4IDataSet* dataSet = (*pos).second;
249  value = dataSet->FindValue(energy);
250  }
251  else
252  {
253  G4cout << "WARNING: G4PixeCrossSectionHandler::FindValue(Z,e) did not find Z = "
254  << Z << G4endl;
255  }
256  return value;
257 }
virtual G4double FindValue(G4double x, G4int componentId=0) const =0
G4GLOB_DLL std::ostream G4cout
const XML_Char int const XML_Char * value
Definition: expat.h:331
G4double energy(const ThreeVector &p, const G4double m)
#define G4endl
Definition: G4ios.hh:61
double G4double
Definition: G4Types.hh:76
static const G4double pos

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G4double G4PixeCrossSectionHandler::FindValue ( G4int  Z,
G4double  e,
G4int  shellIndex 
) const

Definition at line 259 of file G4PixeCrossSectionHandler.cc.

261 {
262  G4double value = 0.;
263 
264  std::map<G4int,G4IDataSet*,std::less<G4int> >::const_iterator pos;
265  pos = dataMap.find(Z);
266  if (pos!= dataMap.end())
267  {
268  // The following is a workaround for STL ObjectSpace implementation,
269  // which does not support the standard and does not accept
270  // the syntax pos->first or pos->second
271  // G4IDataSet* dataSet = pos->second;
272  G4IDataSet* dataSet = (*pos).second;
273  if (shellIndex >= 0)
274  {
275  G4int nComponents = dataSet->NumberOfComponents();
276  if(shellIndex < nComponents)
277  // The value is the cross section for shell component at given energy
278  value = dataSet->GetComponent(shellIndex)->FindValue(energy);
279  else
280  {
281  G4cout << "WARNING: G4PixeCrossSectionHandler::FindValue(Z,e,shell) did not find"
282  << " shellIndex= " << shellIndex
283  << " for Z= "
284  << Z << G4endl;
285  }
286  } else {
287  value = dataSet->FindValue(energy);
288  }
289  }
290  else
291  {
292  G4cout << "WARNING: G4PixeCrossSectionHandler::FindValue did not find Z = "
293  << Z << G4endl;
294  }
295  return value;
296 }
virtual const G4IDataSet * GetComponent(G4int componentId) const =0
virtual G4double FindValue(G4double x, G4int componentId=0) const =0
virtual size_t NumberOfComponents(void) const =0
int G4int
Definition: G4Types.hh:78
G4GLOB_DLL std::ostream G4cout
const XML_Char int const XML_Char * value
Definition: expat.h:331
G4double energy(const ThreeVector &p, const G4double m)
#define G4endl
Definition: G4ios.hh:61
double G4double
Definition: G4Types.hh:76
static const G4double pos

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void G4PixeCrossSectionHandler::Initialise ( G4IInterpolator interpolation,
const G4String modelK = "ecpssr",
const G4String modelL = "ecpssr",
const G4String modelM = "ecpssr",
G4double  minE = 1*CLHEP::keV,
G4double  maxE = 0.1*CLHEP::GeV,
G4int  nBins = 200,
G4double  unitE = CLHEP::MeV,
G4double  unitData = CLHEP::barn,
G4int  minZ = 6,
G4int  maxZ = 92 
)

Definition at line 126 of file G4PixeCrossSectionHandler.cc.

134 {
135  if (algorithm != 0)
136  {
137  delete interpolation;
138  interpolation = algorithm;
139  }
140  else
141  {
142  interpolation = CreateInterpolation();
143  }
144 
145  eMin = minE;
146  eMax = maxE;
147  nBins = numberOfBins;
148  unit1 = unitE;
149  unit2 = unitData;
150  zMin = minZ;
151  zMax = maxZ;
152 
153  crossModel.push_back(modelK);
154  crossModel.push_back(modelL);
155  crossModel.push_back(modelM);
156 
157 }

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void G4PixeCrossSectionHandler::LoadShellData ( const G4String dataFile)

Definition at line 180 of file G4PixeCrossSectionHandler.cc.

181 {
182  size_t nZ = activeZ.size();
183  for (size_t i=0; i<nZ; i++)
184  {
185  G4int Z = (G4int) activeZ[i];
186  G4IInterpolator* algo = interpolation->Clone();
187  G4IDataSet* dataSet = new G4PixeShellDataSet(Z, algo,crossModel[0],crossModel[1],crossModel[2]);
188 
189  // Degug printing
190  //std::cout << "PixeCrossSectionHandler::Load - "
191  // << Z
192  // << ", modelK = "
193  // << crossModel[0]
194  // << " fileName = "
195  // << fileName
196  // << std::endl;
197 
198  dataSet->LoadData(fileName);
199  dataMap[Z] = dataSet;
200  }
201 
202  // Build cross sections for materials if not already built
203  if (! crossSections)
204  {
205  BuildForMaterials();
206  }
207 
208 }
int G4int
Definition: G4Types.hh:78
virtual G4bool LoadData(const G4String &fileName)=0
virtual G4IInterpolator * Clone() const =0

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G4double G4PixeCrossSectionHandler::MicroscopicCrossSection ( const G4ParticleDefinition particleDef,
G4double  kineticEnergy,
G4double  Z,
G4double  deltaCut 
) const

Definition at line 695 of file G4PixeCrossSectionHandler.cc.

699 {
700  // Cross section formula is OK for spin=0, 1/2, 1 only !
701  // Calculates the microscopic cross section in Geant4 internal units
702  // Formula documented in Geant4 Phys. Ref. Manual
703  // ( it is called for elements, AtomicNumber = z )
704 
705  G4double cross = 0.;
706 
707  // Particle mass and energy
708  G4double particleMass = particleDef->GetPDGMass();
709  G4double energy = kineticEnergy + particleMass;
710 
711  // Some kinematics
712  G4double gamma = energy / particleMass;
713  G4double beta2 = 1. - 1. / (gamma * gamma);
714  G4double var = electron_mass_c2 / particleMass;
715  G4double tMax = 2. * electron_mass_c2 * (gamma*gamma - 1.) / (1. + 2.*gamma*var + var*var);
716 
717  // Calculate the total cross section
718 
719  if ( tMax > deltaCut )
720  {
721  var = deltaCut / tMax;
722  cross = (1. - var * (1. - beta2 * std::log(var))) / deltaCut;
723 
724  G4double spin = particleDef->GetPDGSpin() ;
725 
726  // +term for spin=1/2 particle
727  if (spin == 0.5)
728  {
729  cross += 0.5 * (tMax - deltaCut) / (energy*energy);
730  }
731  // +term for spin=1 particle
732  else if (spin > 0.9 )
733  {
734  cross += -std::log(var) / (3.*deltaCut) + (tMax-deltaCut) *
735  ((5.+1./var)*0.25 /(energy*energy) - beta2 / (tMax*deltaCut))/3.;
736  }
737  cross *= twopi_mc2_rcl2 * Z / beta2 ;
738  }
739 
740  //std::cout << "Microscopic = " << cross/barn
741  // << ", e = " << kineticEnergy/MeV <<std:: endl;
742 
743  return cross;
744 }
static constexpr double twopi_mc2_rcl2
static constexpr double electron_mass_c2
G4double GetPDGMass() const
G4double energy(const ThreeVector &p, const G4double m)
G4double GetPDGSpin() const
double G4double
Definition: G4Types.hh:76

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void G4PixeCrossSectionHandler::PrintData ( void  ) const

Definition at line 159 of file G4PixeCrossSectionHandler.cc.

160 {
161  std::map<G4int,G4IDataSet*,std::less<G4int> >::const_iterator pos;
162 
163  for (pos = dataMap.begin(); pos != dataMap.end(); pos++)
164  {
165  // The following is a workaround for STL ObjectSpace implementation,
166  // which does not support the standard and does not accept
167  // the syntax pos->first or pos->second
168  // G4int z = pos->first;
169  // G4IDataSet* dataSet = pos->second;
170  G4int z = (*pos).first;
171  G4IDataSet* dataSet = (*pos).second;
172  G4cout << "---- Data set for Z = "
173  << z
174  << G4endl;
175  dataSet->PrintData();
176  G4cout << "--------------------------------------------------" << G4endl;
177  }
178 }
int G4int
Definition: G4Types.hh:78
G4GLOB_DLL std::ostream G4cout
#define G4endl
Definition: G4ios.hh:61
virtual void PrintData(void) const =0
static const G4double pos

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G4int G4PixeCrossSectionHandler::SelectRandomAtom ( const G4Material material,
G4double  e 
) const

Definition at line 448 of file G4PixeCrossSectionHandler.cc.

450 {
451  // Select randomly an element within the material, according to the weight
452  // determined by the cross sections in the data set
453 
454  G4int nElements = material->GetNumberOfElements();
455 
456  // Special case: the material consists of one element
457  if (nElements == 1)
458  {
459  G4int Z = (G4int) material->GetZ();
460  return Z;
461  }
462 
463  // Composite material
464 
465  const G4ElementVector* elementVector = material->GetElementVector();
466  size_t materialIndex = material->GetIndex();
467 
468  G4IDataSet* materialSet = (*crossSections)[materialIndex];
469  G4double materialCrossSection0 = 0.0;
470  G4DataVector cross;
471  cross.clear();
472  for ( G4int i=0; i < nElements; i++ )
473  {
474  G4double cr = materialSet->GetComponent(i)->FindValue(e);
475  materialCrossSection0 += cr;
476  cross.push_back(materialCrossSection0);
477  }
478 
479  G4double random = G4UniformRand() * materialCrossSection0;
480 
481  for (G4int k=0 ; k < nElements ; k++ )
482  {
483  if (random <= cross[k]) return (G4int) (*elementVector)[k]->GetZ();
484  }
485  // It should never get here
486  return 0;
487 }
virtual const G4IDataSet * GetComponent(G4int componentId) const =0
G4double GetZ() const
Definition: G4Material.cc:623
std::vector< G4Element * > G4ElementVector
size_t GetIndex() const
Definition: G4Material.hh:262
virtual G4double FindValue(G4double x, G4int componentId=0) const =0
const G4ElementVector * GetElementVector() const
Definition: G4Material.hh:190
int G4int
Definition: G4Types.hh:78
#define G4UniformRand()
Definition: Randomize.hh:97
size_t GetNumberOfElements() const
Definition: G4Material.hh:186
double G4double
Definition: G4Types.hh:76

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G4int G4PixeCrossSectionHandler::SelectRandomShell ( G4int  Z,
G4double  e 
) const

Definition at line 538 of file G4PixeCrossSectionHandler.cc.

539 {
540  // Select randomly a shell, according to the weight determined by the cross sections
541  // in the data set
542 
543  // Note for later improvement: it would be useful to add a cache mechanism for already
544  // used shells to improve performance
545 
546  G4int shell = 0;
547 
548  G4double totCrossSection = FindValue(Z,e);
549  G4double random = G4UniformRand() * totCrossSection;
550  G4double partialSum = 0.;
551 
552  G4IDataSet* dataSet = 0;
553  std::map<G4int,G4IDataSet*,std::less<G4int> >::const_iterator pos;
554  pos = dataMap.find(Z);
555  // The following is a workaround for STL ObjectSpace implementation,
556  // which does not support the standard and does not accept
557  // the syntax pos->first or pos->second
558  // if (pos != dataMap.end()) dataSet = pos->second;
559  if (pos != dataMap.end()) dataSet = (*pos).second;
560 
561  size_t nShells = dataSet->NumberOfComponents();
562  for (size_t i=0; i<nShells; i++)
563  {
564  const G4IDataSet* shellDataSet = dataSet->GetComponent(i);
565  if (shellDataSet != 0)
566  {
567  G4double value = shellDataSet->FindValue(e);
568  partialSum += value;
569  if (random <= partialSum) return i;
570  }
571  }
572  // It should never get here
573  return shell;
574 }
virtual const G4IDataSet * GetComponent(G4int componentId) const =0
virtual G4double FindValue(G4double x, G4int componentId=0) const =0
virtual size_t NumberOfComponents(void) const =0
int G4int
Definition: G4Types.hh:78
#define G4UniformRand()
Definition: Randomize.hh:97
const XML_Char int const XML_Char * value
Definition: expat.h:331
double G4double
Definition: G4Types.hh:76
G4double FindValue(G4int Z, G4double e) const
static const G4double pos

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G4double G4PixeCrossSectionHandler::ValueForMaterial ( const G4Material material,
G4double  e 
) const

Definition at line 299 of file G4PixeCrossSectionHandler.cc.

301 {
302  G4double value = 0.;
303 
304  const G4ElementVector* elementVector = material->GetElementVector();
305  const G4double* nAtomsPerVolume = material->GetVecNbOfAtomsPerVolume();
306  G4int nElements = material->GetNumberOfElements();
307 
308  for (G4int i=0 ; i<nElements ; i++)
309  {
310  G4int Z = (G4int) (*elementVector)[i]->GetZ();
311  G4double elementValue = FindValue(Z,energy);
312  G4double nAtomsVol = nAtomsPerVolume[i];
313  value += nAtomsVol * elementValue;
314  }
315 
316  return value;
317 }
std::vector< G4Element * > G4ElementVector
const G4ElementVector * GetElementVector() const
Definition: G4Material.hh:190
int G4int
Definition: G4Types.hh:78
const G4double * GetVecNbOfAtomsPerVolume() const
Definition: G4Material.hh:206
const XML_Char int const XML_Char * value
Definition: expat.h:331
G4double energy(const ThreeVector &p, const G4double m)
size_t GetNumberOfElements() const
Definition: G4Material.hh:186
double G4double
Definition: G4Types.hh:76
G4double FindValue(G4int Z, G4double e) const

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The documentation for this class was generated from the following files: