Import Geant4 10.0.0 source tree
This commit is contained in:
Gabriele Cosmo
@@ -136,33 +136,22 @@ G4EMDissociation::G4EMDissociation(const G4EMDissociation& emd)
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G4EMDissociation::G4EMDissociation (G4ExcitationHandler *aExcitationHandler)
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{
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//
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//
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// Send message to stdout to advise that the G4EMDissociation model is being
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// used.
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//
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// Send message to stdout to advise that the G4EMDissociation model is being
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// used.
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PrintWelcomeMessage();
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theExcitationHandler = aExcitationHandler;
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handlerDefinedInternally = false;
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//
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//
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// This EM dissociation model needs access to the cross-sections held in
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// G4EMDissociationCrossSection.
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//
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// This EM dissociation model needs access to the cross-sections held in
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// G4EMDissociationCrossSection.
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dissociationCrossSection = new G4EMDissociationCrossSection;
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thePhotonSpectrum = new G4EMDissociationSpectrum;
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//
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//
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// Set the minimum and maximum range for the model (despite nomanclature, this
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// is in energy per nucleon number).
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//
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// Set the minimum and maximum range for the model (despite nomanclature, this
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// is in energy per nucleon number)
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SetMinEnergy(100.0*MeV);
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SetMaxEnergy(500.0*GeV);
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//
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//
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// Set the default verbose level to 0 - no output.
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//
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verboseLevel = 0;
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}
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@@ -179,19 +168,16 @@ G4EMDissociation::~G4EMDissociation() {
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G4HadFinalState *G4EMDissociation::ApplyYourself
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(const G4HadProjectile &theTrack, G4Nucleus &theTarget)
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{
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//
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//
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// The secondaries will be returned in G4HadFinalState &theParticleChange -
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// initialise this.
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//
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// The secondaries will be returned in G4HadFinalState &theParticleChange -
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// initialise this.
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theParticleChange.Clear();
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theParticleChange.SetStatusChange(stopAndKill);
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//
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//
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// Get relevant information about the projectile and target (A, Z) and
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// energy/nuc, momentum, velocity, Lorentz factor and rest-mass of the
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// projectile.
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//
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// Get relevant information about the projectile and target (A, Z) and
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// energy/nuc, momentum, velocity, Lorentz factor and rest-mass of the
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// projectile.
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const G4ParticleDefinition *definitionP = theTrack.GetDefinition();
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const G4double AP = definitionP->GetBaryonNumber();
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const G4double ZP = definitionP->GetPDGCharge();
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@@ -202,13 +188,10 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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G4double AT = theTarget.GetA_asInt();
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G4double ZT = theTarget.GetZ_asInt();
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G4double MT = G4NucleiProperties::GetNuclearMass(AT,ZT);
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//
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//
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// Depending upon the verbosity level, output the initial information on the
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// projectile and target.
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//
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if (verboseLevel >= 2)
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{
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// Depending upon the verbosity level, output the initial information on the
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// projectile and target
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if (verboseLevel >= 2) {
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G4cout.precision(6);
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G4cout <<"########################################"
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<<"########################################"
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@@ -222,23 +205,21 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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<<G4endl;
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G4cout <<"Projectile momentum and Energy/nuc = " <<pP <<" ," <<E <<G4endl;
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}
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//
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//
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// Initialise the variables which will be used with the phase-space decay and
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// to boost the secondaries from the interaction.
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//
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// Initialise the variables which will be used with the phase-space decay and
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// to boost the secondaries from the interaction.
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G4ParticleDefinition *typeNucleon = NULL;
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G4ParticleDefinition *typeDaughter = NULL;
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G4double Eg = 0.0;
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G4double mass = 0.0;
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G4ThreeVector boost = G4ThreeVector(0.0, 0.0, 0.0);
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//
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//
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// Determine the cross-sections at the giant dipole and giant quadrupole
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// resonance energies for the projectile and then target. The information is
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// initially provided in the G4PhysicsFreeVector individually for the E1
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// and E2 fields. These are then summed.
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//
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// Determine the cross-sections at the giant dipole and giant quadrupole
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// resonance energies for the projectile and then target. The information is
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// initially provided in the G4PhysicsFreeVector individually for the E1
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// and E2 fields. These are then summed.
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G4double bmin = thePhotonSpectrum->GetClosestApproach(AP, ZP, AT, ZT, b);
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G4PhysicsFreeVector *crossSectionP = dissociationCrossSection->
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GetCrossSectionForProjectile(AP, ZP, AT, ZT, b, bmin);
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@@ -247,22 +228,19 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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G4double totCrossSectionP = (*crossSectionP)[0]+(*crossSectionP)[1];
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G4double totCrossSectionT = (*crossSectionT)[0]+(*crossSectionT)[1];
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//
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//
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// Now sample whether the interaction involved EM dissociation of the projectile
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// or the target.
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//
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// Now sample whether the interaction involved EM dissociation of the projectile
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// or the target.
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if (G4UniformRand() <
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totCrossSectionP / (totCrossSectionP + totCrossSectionT))
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{
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//
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//
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// It was the projectile which underwent EM dissociation. Define the Lorentz
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// boost to be applied to the secondaries, and sample whether a proton or a
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// neutron was ejected. Then determine the energy of the virtual gamma ray
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// which passed from the target nucleus ... this will be used to define the
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// excitation of the projectile.
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//
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totCrossSectionP / (totCrossSectionP + totCrossSectionT)) {
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// It was the projectile which underwent EM dissociation. Define the Lorentz
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// boost to be applied to the secondaries, and sample whether a proton or a
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// neutron was ejected. Then determine the energy of the virtual gamma ray
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// which passed from the target nucleus ... this will be used to define the
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// excitation of the projectile.
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mass = MP;
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if (G4UniformRand() < dissociationCrossSection->
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GetWilsonProbabilityForProtonDissociation (AP, ZP))
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@@ -295,24 +273,21 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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if (verboseLevel >= 2)
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G4cout <<"Transition type was E2" <<G4endl;
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}
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//
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//
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// We need to define a Lorentz vector with the original momentum, but total
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// energy includes the projectile and virtual gamma. This is then used
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// to calculate the boost required for the secondaries.
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//
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// We need to define a Lorentz vector with the original momentum, but total
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// energy includes the projectile and virtual gamma. This is then used
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// to calculate the boost required for the secondaries.
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pP.setE(pP.e()+Eg);
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boost = pP.findBoostToCM();
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}
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else
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{
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//
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//
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// It was the target which underwent EM dissociation. Sample whether a
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// proton or a neutron was ejected. Then determine the energy of the virtual
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// gamma ray which passed from the projectile nucleus ... this will be used to
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// define the excitation of the target.
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//
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// It was the target which underwent EM dissociation. Sample whether a
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// proton or a neutron was ejected. Then determine the energy of the virtual
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// gamma ray which passed from the projectile nucleus ... this will be used to
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// define the excitation of the target.
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mass = MT;
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if (G4UniformRand() < dissociationCrossSection->
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GetWilsonProbabilityForProtonDissociation (AT, ZT))
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@@ -345,12 +320,11 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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if (verboseLevel >= 2)
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G4cout <<"Transition type was E2" <<G4endl;
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}
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//
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//
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// Add the projectile to theParticleChange, less the energy of the
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// not-so-virtual gamma-ray. Not that at the moment, no lateral momentum
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// is transferred between the projectile and target nuclei.
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//
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// Add the projectile to theParticleChange, less the energy of the
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// not-so-virtual gamma-ray. Not that at the moment, no lateral momentum
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// is transferred between the projectile and target nuclei.
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G4ThreeVector v = pP.vect();
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v.setMag(1.0);
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G4DynamicParticle *changedP = new G4DynamicParticle
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@@ -362,21 +336,19 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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changedP->DumpInfo();
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}
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}
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//
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//
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// Perform a two-body decay based on the restmass energy of the parent and
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// gamma-ray, and the masses of the daughters. In the frame of reference of
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// the nucles, the angular distribution is sampled isotropically, but the
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// the nucleon and secondary nucleus are boosted if they've come from the
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// projectile.
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//
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// Perform a two-body decay based on the restmass energy of the parent and
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// gamma-ray, and the masses of the daughters. In the frame of reference of
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// the nucles, the angular distribution is sampled isotropically, but the
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// the nucleon and secondary nucleus are boosted if they've come from the
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// projectile.
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G4double e = mass + Eg;
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G4double mass1 = typeNucleon->GetPDGMass();
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G4double mass2 = typeDaughter->GetPDGMass();
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G4double pp = (e+mass1+mass2)*(e+mass1-mass2)*
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(e-mass1+mass2)*(e-mass1-mass2)/(4.0*e*e);
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if (pp < 0.0)
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{
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if (pp < 0.0) {
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pp = 1.0*eV;
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// if (verboseLevel >`= 1)
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// {
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@@ -400,42 +372,41 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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G4DynamicParticle *dynamicDaughter =
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new G4DynamicParticle(typeDaughter, -direction*pp);
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dynamicDaughter->Set4Momentum(dynamicDaughter->Get4Momentum().boost(-boost));
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//
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//
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// The "decay" products have to be transferred to the G4HadFinalState object.
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// Furthermore, the residual nucleus should be de-excited.
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//
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// The "decay" products have to be transferred to the G4HadFinalState object.
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// Furthermore, the residual nucleus should be de-excited.
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theParticleChange.AddSecondary (dynamicNucleon);
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if (verboseLevel >= 2)
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{
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if (verboseLevel >= 2) {
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G4cout <<"Nucleon from the EMD process:" <<G4endl;
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dynamicNucleon->DumpInfo();
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}
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G4Fragment *theFragment = new
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G4Fragment* theFragment = new
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G4Fragment((G4int) typeDaughter->GetBaryonNumber(),
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(G4int) typeDaughter->GetPDGCharge(), dynamicDaughter->Get4Momentum());
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if (verboseLevel >= 2)
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{
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if (verboseLevel >= 2) {
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G4cout <<"Dynamic properties of the prefragment:" <<G4endl;
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G4cout.precision(6);
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dynamicDaughter->DumpInfo();
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G4cout <<"Nuclear properties of the prefragment:" <<G4endl;
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G4cout <<theFragment <<G4endl;
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}
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G4ReactionProductVector *products =
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theExcitationHandler->BreakItUp(*theFragment);
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G4ReactionProductVector* products =
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theExcitationHandler->BreakItUp(*theFragment);
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delete theFragment;
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theFragment = NULL;
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G4DynamicParticle* secondary = 0;
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G4ReactionProductVector::iterator iter;
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for (iter = products->begin(); iter != products->end(); ++iter)
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{
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G4DynamicParticle *secondary =
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new G4DynamicParticle((*iter)->GetDefinition(),
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(*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
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for (iter = products->begin(); iter != products->end(); ++iter) {
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secondary = new G4DynamicParticle((*iter)->GetDefinition(),
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(*iter)->GetTotalEnergy(), (*iter)->GetMomentum());
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theParticleChange.AddSecondary (secondary);
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}
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delete products;
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if (verboseLevel >= 2)
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G4cout <<"########################################"
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@@ -444,8 +415,8 @@ G4HadFinalState *G4EMDissociation::ApplyYourself
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return &theParticleChange;
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}
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////////////////////////////////////////////////////////////////////////////////
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//
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void G4EMDissociation::PrintWelcomeMessage ()
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{
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G4cout <<G4endl;
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@@ -461,5 +432,4 @@ void G4EMDissociation::PrintWelcomeMessage ()
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return;
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}
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////////////////////////////////////////////////////////////////////////////////
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//
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