Gabriele Cosmo
122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
//
|
|
// ********************************************************************
|
|
// * License and Disclaimer *
|
|
// * *
|
|
// * The Geant4 software is copyright of the Copyright Holders of *
|
|
// * the Geant4 Collaboration. It is provided under the terms and *
|
|
// * conditions of the Geant4 Software License, included in the file *
|
|
// * LICENSE and available at http://cern.ch/geant4/license . These *
|
|
// * include a list of copyright holders. *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. Please see the license in the file LICENSE and URL above *
|
|
// * for the full disclaimer and the limitation of liability. *
|
|
// * *
|
|
// * This code implementation is the result of the scientific and *
|
|
// * technical work of the GEANT4 collaboration. *
|
|
// * By using, copying, modifying or distributing the software (or *
|
|
// * any work based on the software) you agree to acknowledge its *
|
|
// * use in resulting scientific publications, and indicate your *
|
|
// * acceptance of all terms of the Geant4 Software license. *
|
|
// ********************************************************************
|
|
//
|
|
// G4DecayTable class implementation
|
|
//
|
|
// Author: H.Kurashige, 7 July 1996
|
|
// --------------------------------------------------------------------
|
|
|
|
#include "G4DecayTable.hh"
|
|
|
|
#include "Randomize.hh"
|
|
#include "globals.hh"
|
|
|
|
G4DecayTable::G4DecayTable()
|
|
{
|
|
channels = new G4VDecayChannelVector;
|
|
}
|
|
|
|
G4DecayTable::~G4DecayTable()
|
|
{
|
|
// remove and delete all contents
|
|
for (const auto channel : *channels) {
|
|
delete channel;
|
|
}
|
|
channels->clear();
|
|
delete channels;
|
|
channels = nullptr;
|
|
parent = nullptr;
|
|
}
|
|
|
|
void G4DecayTable::Insert(G4VDecayChannel* aChannel)
|
|
{
|
|
if (parent == nullptr) {
|
|
parent = (G4ParticleDefinition*)(aChannel->GetParent());
|
|
}
|
|
if (parent != aChannel->GetParent()) {
|
|
#ifdef G4VERBOSE
|
|
G4cout << " G4DecayTable::Insert :: bad G4VDecayChannel (mismatch parent) "
|
|
<< " " << parent->GetParticleName()
|
|
<< " input:" << aChannel->GetParent()->GetParticleName() << G4endl;
|
|
#endif
|
|
}
|
|
else {
|
|
G4double br = aChannel->GetBR();
|
|
for (auto iCh = channels->cbegin(); iCh != channels->cend(); ++iCh) {
|
|
if (br > (*iCh)->GetBR()) {
|
|
channels->insert(iCh, aChannel);
|
|
return;
|
|
}
|
|
}
|
|
channels->push_back(aChannel);
|
|
}
|
|
}
|
|
|
|
G4VDecayChannel* G4DecayTable::SelectADecayChannel(G4double parentMass)
|
|
{
|
|
// check if contents exist
|
|
if (channels->empty()) return nullptr;
|
|
|
|
if (parentMass < 0.) parentMass = parent->GetPDGMass();
|
|
|
|
G4double sumBR = 0.;
|
|
for (const auto channel : *channels) {
|
|
if (!(channel->IsOKWithParentMass(parentMass))) continue;
|
|
sumBR += channel->GetBR();
|
|
}
|
|
if (sumBR <= 0.0) {
|
|
#ifdef G4VERBOSE
|
|
G4cout << " G4DecayTable::SelectADecayChannel :: no possible DecayChannel"
|
|
<< " " << parent->GetParticleName() << G4endl;
|
|
#endif
|
|
return nullptr;
|
|
}
|
|
|
|
const std::size_t MAX_LOOP = 10000;
|
|
for (std::size_t loop_counter = 0; loop_counter < MAX_LOOP; ++loop_counter) {
|
|
G4double sum = 0.0;
|
|
G4double br = sumBR * G4UniformRand();
|
|
// select decay channel
|
|
for (const auto channel : *channels) {
|
|
sum += channel->GetBR();
|
|
if (!(channel->IsOKWithParentMass(parentMass))) continue;
|
|
if (br < sum) return channel;
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
void G4DecayTable::DumpInfo() const
|
|
{
|
|
G4cout << "G4DecayTable: " << parent->GetParticleName() << G4endl;
|
|
G4int index = 0;
|
|
for (const auto channel : *channels) {
|
|
G4cout << index << ": ";
|
|
channel->DumpInfo();
|
|
index += 1;
|
|
}
|
|
G4cout << G4endl;
|
|
}
|