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This commit is contained in:
Gabriele Cosmo
2016-06-10 14:11:04 +02:00
parent c9b32a6c0a
commit d4af681f38
4886 changed files with 420149 additions and 1023309 deletions
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source/processes/hadronic/models/radioactive_decay/src/G4AlphaDecay.cc
+25 -16
View File
@@ -45,28 +45,21 @@
G4AlphaDecay::G4AlphaDecay(const G4ParticleDefinition* theParentNucleus,
const G4double& branch, const G4double& Qvalue,
const G4double& excitationE)
: G4VDecayChannel("alpha decay"), transitionQ(Qvalue), daughterEx(excitationE),
halflifeThreshold(nanosecond)
: G4NuclearDecay("alpha decay", Alpha, excitationE), transitionQ(Qvalue)
{
SetParent(theParentNucleus); // Store name of parent nucleus, delete G4MT_parent
SetBR(branch);
SetNumberOfDaughters(2);
SetDaughter(0, "alpha"); // Store name of 1st daughter
G4IonTable* theIonTable =
(G4IonTable*)(G4ParticleTable::GetParticleTable()->GetIonTable());
G4int daughterZ = theParentNucleus->GetAtomicNumber() - 2;
G4int daughterA = theParentNucleus->GetAtomicMass() - 4;
SetDaughter(1, theIonTable->GetIon(daughterZ, daughterA, daughterEx) );
SetDaughter(0, theIonTable->GetIon(daughterZ, daughterA, excitationE) );
SetDaughter(1, "alpha");
}
G4AlphaDecay::G4AlphaDecay(const G4AlphaDecay& right)
: G4VDecayChannel(right), transitionQ(right.transitionQ),
daughterEx(right.daughterEx), halflifeThreshold(right.halflifeThreshold)
{}
G4AlphaDecay::~G4AlphaDecay()
{}
@@ -79,9 +72,9 @@ G4DecayProducts* G4AlphaDecay::DecayIt(G4double)
// Fill G4MT_daughters with alpha and residual nucleus (stored by SetDaughter)
if (G4MT_daughters == 0) FillDaughters();
G4double alphaMass = G4MT_daughters[0]->GetPDGMass();
G4double alphaMass = G4MT_daughters[1]->GetPDGMass();
// Excitation energy included in PDG mass
G4double nucleusMass = G4MT_daughters[1]->GetPDGMass();
G4double nucleusMass = G4MT_daughters[0]->GetPDGMass();
// Q value was calculated from atomic masses.
// Use it to get correct alpha energy.
@@ -105,23 +98,39 @@ G4DecayProducts* G4AlphaDecay::DecayIt(G4double)
G4double KE = std::sqrt(cmMomentum*cmMomentum + alphaMass*alphaMass)
- alphaMass;
G4DynamicParticle* daughterparticle =
new G4DynamicParticle(G4MT_daughters[0], direction, KE, alphaMass);
new G4DynamicParticle(G4MT_daughters[1], direction, KE, alphaMass);
products->PushProducts(daughterparticle);
KE = std::sqrt(cmMomentum*cmMomentum + nucleusMass*nucleusMass) - nucleusMass;
daughterparticle =
new G4DynamicParticle(G4MT_daughters[1], -1.0*direction, KE, nucleusMass);
new G4DynamicParticle(G4MT_daughters[0], -1.0*direction, KE, nucleusMass);
products->PushProducts(daughterparticle);
// Energy conservation check
// For alpha decays, do final energy check against reaction Q value
// which is well-measured using atomic mass differences. Nuclear masses
// should not be used since they are not usually directly measured and we
// always decay atoms and not fully stripped nuclei.
/*
G4int nProd = products->entries();
G4DynamicParticle* temp = 0;
G4double Esum = 0.0;
for (G4int i = 0; i < nProd; i++) {
temp = products->operator[](i);
Esum += temp->GetKineticEnergy();
}
G4double eCons = (transitionQ - Esum)/keV;
if (eCons > 1.e-07) G4cout << " Alpha decay check: Ediff (keV) = " << eCons << G4endl;
*/
return products;
}
void G4AlphaDecay::DumpInfo()
void G4AlphaDecay::DumpNuclearInfo()
{
G4cout << " G4AlphaDecay for parent nucleus " << GetParentName() << G4endl;
G4cout << " decays to " << GetDaughterName(0) << " + " << GetDaughterName(1)
<< " with branching ratio " << GetBR() << " and Q value "
<< " with branching ratio " << GetBR() << "% and Q value "
<< transitionQ << G4endl;
}