Import Geant4 8.3.0 source tree

2016-06-09 15:07:44 +02:00
parent fe73f43734
commit 75c7fd177d
764 changed files with 45230 additions and 95238 deletions
@@ -24,13 +24,12 @@
 // ********************************************************************
 //
 //
-//
-// GEANT4 physics class: G4CrossSectionDataStore
-// F.W. Jones, TRIUMF, 19-NOV-97
-//

 #include "G4CrossSectionDataStore.hh"
 #include "G4HadronicException.hh"
+#include "G4StableIsotopes.hh"
+#include "G4HadTmpUtil.hh"
+#include "Randomize.hh"


 G4double
@@ -38,20 +37,186 @@ G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
                                         const G4Element* anElement,
 					 G4double aTemperature)
 {
-   if (NDataSetList == 0) 
-   {
-      throw G4HadronicException(__FILE__, __LINE__, 
-       "G4CrossSectionDataStore: no data sets registered");
-      return DBL_MIN;
-   }
-   for (G4int i = NDataSetList-1; i >= 0; i--) {
-      if (DataSetList[i]->IsApplicable(aParticle, anElement))
-             return DataSetList[i]->GetCrossSection(aParticle, anElement, aTemperature);
-   }
-   throw G4HadronicException(__FILE__, __LINE__, 
-                            "G4CrossSectionDataStore: no applicable data set found "
-                            "for particle/element");
-   return DBL_MIN;
+  if (NDataSetList == 0) 
+  {
+    throw G4HadronicException(__FILE__, __LINE__, 
+     "G4CrossSectionDataStore: no data sets registered");
+    return DBL_MIN;
+  }
+  for (G4int i = NDataSetList-1; i >= 0; i--) {
+    if (DataSetList[i]->IsApplicable(aParticle, anElement))
+      return DataSetList[i]->GetCrossSection(aParticle,anElement,aTemperature);
+  }
+  throw G4HadronicException(__FILE__, __LINE__, 
+                      "G4CrossSectionDataStore: no applicable data set found "
+                      "for particle/element");
+  return DBL_MIN;
+}
+
+
+G4double
+G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
+                                         const G4Isotope* anIsotope,
+					 G4double aTemperature)
+{
+  if (NDataSetList == 0) 
+  {
+    throw G4HadronicException(__FILE__, __LINE__, 
+     "G4CrossSectionDataStore: no data sets registered");
+    return DBL_MIN;
+  }
+  for (G4int i = NDataSetList-1; i >= 0; i--) {
+    if (DataSetList[i]->IsZAApplicable(aParticle, anIsotope->GetZ(), anIsotope->GetN()))
+      return DataSetList[i]->GetIsoCrossSection(aParticle,anIsotope,aTemperature);
+  }
+  throw G4HadronicException(__FILE__, __LINE__, 
+                      "G4CrossSectionDataStore: no applicable data set found "
+                      "for particle/element");
+  return DBL_MIN;
+}
+
+
+G4double
+G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
+                                         G4double Z, G4double A,
+					 G4double aTemperature)
+{
+  if (NDataSetList == 0) 
+  {
+    throw G4HadronicException(__FILE__, __LINE__, 
+     "G4CrossSectionDataStore: no data sets registered");
+    return DBL_MIN;
+  }
+  for (G4int i = NDataSetList-1; i >= 0; i--) {
+      if (DataSetList[i]->IsZAApplicable(aParticle, Z, A))
+      return DataSetList[i]->GetIsoZACrossSection(aParticle,Z,A,aTemperature);
+  }
+  throw G4HadronicException(__FILE__, __LINE__, 
+                      "G4CrossSectionDataStore: no applicable data set found "
+                      "for particle/element");
+  return DBL_MIN;
+}
+
+
+G4double
+G4CrossSectionDataStore::GetCrossSection(const G4DynamicParticle* aParticle,
+                                         const G4Material* aMaterial)
+{
+  G4double sigma(0);
+  G4double aTemp = aMaterial->GetTemperature();
+  G4int nElements = aMaterial->GetNumberOfElements();
+  const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
+  G4double xSection(0);
+
+  for(G4int i=0; i<nElements; i++) {
+    xSection = GetCrossSection( aParticle, (*aMaterial->GetElementVector())[i], aTemp);
+    sigma += theAtomsPerVolumeVector[i] * xSection;
+  }
+
+  return sigma;
+}
+
+
+std::pair<G4double, G4double> 
+G4CrossSectionDataStore::SelectRandomIsotope(const G4DynamicParticle* particle,
+                                             const G4Material* aMaterial)
+{
+  static G4StableIsotopes theDefaultIsotopes;  // natural abundances and 
+                                               // stable isotopes
+  G4double aTemp = aMaterial->GetTemperature();
+  G4int nElements = aMaterial->GetNumberOfElements();
+  const G4ElementVector* theElementVector = aMaterial->GetElementVector();
+  const G4double* theAtomsPerVolumeVector = aMaterial->GetVecNbOfAtomsPerVolume();
+  std::vector<std::vector<G4double> > awicsPerElement;
+  std::vector<std::vector<G4double> > AvaluesPerElement;
+  G4Element* anElement;
+
+  // Collect abundance weighted cross sections and A values for each isotope 
+  // in each element
+ 
+  for (G4int i = 0; i < nElements; i++) {
+    anElement = (*theElementVector)[i];
+    G4int nIsoPerElement = anElement->GetNumberOfIsotopes();
+    std::vector<G4double> isoholder;
+    std::vector<G4double> aholder;
+    G4double iso_xs;
+
+    if (nIsoPerElement) { // user-defined isotope abundances
+      G4IsotopeVector* isoVector = anElement->GetIsotopeVector();
+      G4double* abundVector = anElement->GetRelativeAbundanceVector();
+      for (G4int j = 0; j < nIsoPerElement; j++) {
+        iso_xs = GetCrossSection(particle, (*isoVector)[j], aTemp);
+        isoholder.push_back(abundVector[j]*iso_xs);
+        aholder.push_back(G4double((*isoVector)[j]->GetN()));
+      }
+
+    } else { // natural abundances
+      G4int ZZ = G4lrint(anElement->GetZ());
+      nIsoPerElement = theDefaultIsotopes.GetNumberOfIsotopes(ZZ);
+      G4int index = theDefaultIsotopes.GetFirstIsotope(ZZ);
+      G4double AA;
+      G4double abundance;
+      for (G4int j = 0; j < nIsoPerElement; j++) {
+        AA = G4double(theDefaultIsotopes.GetIsotopeNucleonCount(index+j));
+        aholder.push_back(AA);
+        iso_xs = GetCrossSection(particle, G4double(ZZ), AA, aTemp);
+        abundance = theDefaultIsotopes.GetAbundance(index+j)/100.0;
+        isoholder.push_back(abundance*iso_xs);
+      }
+    }
+
+    awicsPerElement.push_back(isoholder);
+    AvaluesPerElement.push_back(aholder);
+  }
+
+  // Calculate running sums for isotope selection
+
+  G4double crossSectionTotal = 0;
+  G4double xSectionPerElement;
+  std::vector<G4double> runningSum;
+
+  for (G4int i=0; i < nElements; i++) {
+    xSectionPerElement = 0;
+    for (G4int j=0; j < G4int(awicsPerElement[i].size()); j++)
+                     xSectionPerElement += awicsPerElement[i][j];
+    runningSum.push_back(theAtomsPerVolumeVector[i]*xSectionPerElement);
+    crossSectionTotal += runningSum[i];
+  }
+
+  // Compare random number to running sum over element xc to choose Z
+
+  // Initialize Z and A to first element and first isotope in case 
+  // cross section is zero
+   
+  G4double ZZ = (*theElementVector)[0]->GetZ();
+  G4double AA = AvaluesPerElement[0][0];
+  if (crossSectionTotal != 0.) {
+    G4double random = G4UniformRand();
+    for(G4int i=0; i < nElements; i++) {
+      if(i!=0) runningSum[i] += runningSum[i-1];
+      if(random <= runningSum[i]/crossSectionTotal) {
+        ZZ = ((*theElementVector)[i])->GetZ();
+
+        // Compare random number to running sum over isotope xc to choose A
+
+        G4int nIso = awicsPerElement[i].size();
+        G4double* running = new G4double[nIso];
+        for (G4int j=0; j < nIso; j++) {
+          running[j] = awicsPerElement[i][j];
+          if(j!=0) running[j] += running[j-1];
+        }
+
+        G4double trial = G4UniformRand(); 
+        for (G4int j=0; j < nIso; j++) {
+          AA = AvaluesPerElement[i][j];
+          if (trial <= running[j]/running[nIso-1]) break;
+        }
+        delete [] running;
+        break;
+      }
+    }
+  }
+  return std::pair<G4double, G4double>(ZZ, AA);
 }