Gabriele Cosmo
357 lines
12 KiB
C++
357 lines
12 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// 080721 Create adjust_final_state method by T. Koi
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// 080801 Residual reconstruction with theNDLDataA,Z (A, Z, and momentum are adjusted) by T. Koi
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// 101110 Set lower limit for gamma energy(1keV) by T. Koi
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// P. Arce, June-2014 Conversion neutron_hp to particle_hp
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//
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#include "G4ParticleHPFinalState.hh"
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#include "G4Alpha.hh"
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#include "G4Deuteron.hh"
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#include "G4Gamma.hh"
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#include "G4He3.hh"
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#include "G4IonTable.hh"
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#include "G4Neutron.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4Proton.hh"
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#include "G4RandomDirection.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4Triton.hh"
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G4ParticleHPFinalState::G4ParticleHPFinalState()
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{
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theProjectile = G4Neutron::Neutron();
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theResult.Put(nullptr);
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fManager = G4ParticleHPManager::GetInstance();
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ionTable = G4IonTable::GetIonTable();
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}
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G4ParticleHPFinalState::~G4ParticleHPFinalState()
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{
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delete theResult.Get();
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}
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void G4ParticleHPFinalState::adjust_final_state(G4LorentzVector init_4p_lab)
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{
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G4double minimum_energy = 1 * keV;
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if (fManager->GetDoNotAdjustFinalState()) return;
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auto nSecondaries = (G4int)theResult.Get()->GetNumberOfSecondaries();
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G4int sum_Z = 0;
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G4int sum_A = 0;
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G4int max_SecZ = 0;
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G4int max_SecA = 0;
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G4int imaxA = -1;
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for (G4int i = 0; i < nSecondaries; ++i) {
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auto ptr = theResult.Get()->GetSecondary(i)->GetParticle()->GetDefinition();
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sum_Z += ptr->GetAtomicNumber();
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max_SecZ = std::max(max_SecZ, ptr->GetAtomicNumber());
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sum_A += ptr->GetAtomicMass();
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max_SecA = std::max(max_SecA, ptr->GetAtomicMass());
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if (ptr->GetAtomicMass() == max_SecA)
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imaxA = i;
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#ifdef G4PHPDEBUG
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if (fManager->GetDEBUG())
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G4cout << "G4ParticleHPFinalState::adjust_final_stat SECO " << i << " "
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<< ptr->GetParticleName() << G4endl;
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#endif
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}
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G4ParticleDefinition* resi_pd = nullptr;
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G4int baseZNew = theBaseZ;
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G4int baseANew = theBaseA;
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if (theProjectile == G4Neutron::Neutron()) {
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baseANew++;
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}
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else if (theProjectile == G4Proton::Proton()) {
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baseZNew++;
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baseANew++;
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}
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else if (theProjectile == G4Deuteron::Deuteron()) {
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baseZNew++;
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baseANew += 2;
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}
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else if (theProjectile == G4Triton::Triton()) {
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baseZNew++;
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baseANew += 3;
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}
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else if (theProjectile == G4He3::He3()) {
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baseZNew += 2;
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baseANew += 3;
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}
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else if (theProjectile == G4Alpha::Alpha()) {
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baseZNew += 2;
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baseANew += 4;
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}
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#ifdef G4PHPDEBUG
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if (fManager->GetDEBUG())
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G4cout << "G4ParticleHPFinalState::adjust_final_stat BaseZ " << baseZNew << " BaseA "
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<< baseANew << " sum_Z " << sum_Z << " sum_A " << sum_A << G4endl;
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#endif
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G4bool needOneMoreSec = false;
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G4ParticleDefinition* oneMoreSec_pd = nullptr;
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if (baseZNew == sum_Z && baseANew == sum_A) {
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// All secondaries are already created;
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resi_pd = theResult.Get()->GetSecondary(imaxA)->GetParticle()->GetDefinition();
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}
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else {
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if (max_SecA >= baseANew - sum_A) {
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// Most heavy secondary is interpreted as residual
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resi_pd = theResult.Get()->GetSecondary(imaxA)->GetParticle()->GetDefinition();
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needOneMoreSec = true;
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}
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else {
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// creation of residual is required
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resi_pd = ionTable->GetIon(baseZNew - sum_Z, baseANew - sum_A, 0.0);
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}
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if (needOneMoreSec) {
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if (baseZNew == sum_Z && baseANew == sum_A) {
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// In this case, one neutron is added to secondaries
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if (baseANew - sum_A > 1)
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G4cout << "More than one neutron is required for the balance of baryon number!"
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<< G4endl;
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oneMoreSec_pd = G4Neutron::Neutron();
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}
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else {
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#ifdef G4PHPDEBUG
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if (fManager->GetDEBUG())
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G4cout << this << "G4ParticleHPFinalState oneMoreSec_pd Z "
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<< baseZNew << " - " << sum_Z
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<< " A " << baseANew << " - " << sum_A << " projectile "
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<< theProjectile->GetParticleName() << G4endl;
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#endif
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oneMoreSec_pd =
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G4IonTable::GetIonTable()->GetIon(baseZNew - sum_Z, baseANew - sum_A, 0.0);
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if (oneMoreSec_pd == nullptr) {
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G4ExceptionDescription ed;
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ed << "G4ParticleHPFinalState oneMoreSec_pd Z=" << baseZNew << " - " << sum_Z
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<< " A=" << baseANew << " - " << sum_A << " projectile "
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<< theProjectile->GetParticleName();
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G4Exception("G4ParticleHPFinalState:adjust_final_state", "hadr01", JustWarning,
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ed, "No adjustment will be done!");
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return;
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}
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}
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}
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if (resi_pd == nullptr) {
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// theNDLDataZ,A has the Z and A of used NDL file
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G4int ndlZNew = theNDLDataZ;
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G4int ndlANew = theNDLDataA;
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if (theProjectile == G4Neutron::Neutron()) {
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ndlANew++;
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}
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else if (theProjectile == G4Proton::Proton()) {
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ndlZNew++;
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ndlANew++;
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}
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else if (theProjectile == G4Deuteron::Deuteron()) {
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ndlZNew++;
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ndlANew += 2;
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}
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else if (theProjectile == G4Triton::Triton()) {
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ndlZNew++;
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ndlANew += 3;
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}
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else if (theProjectile == G4He3::He3()) {
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ndlZNew += 2;
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ndlANew += 3;
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}
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else if (theProjectile == G4Alpha::Alpha()) {
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ndlZNew += 2;
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ndlANew += 4;
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}
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// theNDLDataZ,A has the Z and A of used NDL file
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if (ndlZNew == sum_Z && ndlANew == sum_A) {
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G4int dif_Z = theNDLDataZ - theBaseZ;
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G4int dif_A = theNDLDataA - theBaseA;
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resi_pd = ionTable->GetIon(max_SecZ - dif_Z, max_SecA - dif_A, 0.0);
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if (resi_pd == nullptr) {
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G4ExceptionDescription ed;
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ed << "resi_pd Z=" << max_SecZ << " - " << dif_Z << " A="
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<< max_SecA << " - " << dif_A << " projectile "
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<< theProjectile->GetParticleName();
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G4Exception("G4ParticleHPFinalState:adjust_final_state", "hadr02", JustWarning,
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ed, "No adjustment will be done!");
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return;
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}
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for (G4int i = 0; i < nSecondaries; ++i) {
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auto ptr = theResult.Get()->GetSecondary(i)->GetParticle();
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if (ptr->GetDefinition()->GetAtomicNumber() == max_SecZ &&
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ptr->GetDefinition()->GetAtomicMass() == max_SecA)
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{
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G4ThreeVector p = ptr->GetMomentum() * resi_pd->GetPDGMass()
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/ ionTable->GetIon(max_SecZ, max_SecA, 0.0)->GetPDGMass();
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ptr->SetDefinition(resi_pd);
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ptr->SetMomentum(p);
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}
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}
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}
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}
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}
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G4LorentzVector secs_4p_lab(0.0);
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auto n_sec = (G4int)theResult.Get()->GetNumberOfSecondaries();
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G4double fast = 0;
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G4double slow = 1;
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G4int ifast = 0;
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G4int islow = 0;
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G4int ires = -1;
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for (G4int i = 0; i < n_sec; ++i) {
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auto ptr = theResult.Get()->GetSecondary(i)->GetParticle();
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secs_4p_lab += ptr->Get4Momentum();
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G4double beta = 0;
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if (ptr->GetDefinition() != G4Gamma::Gamma()) {
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beta = ptr->Get4Momentum().beta();
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}
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else {
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beta = 1.0;
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}
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if (ptr->GetDefinition() == resi_pd) ires = i;
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if (slow > beta && beta != 0) {
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slow = beta;
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islow = i;
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}
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if (fast <= beta) {
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if (fast != 1) {
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fast = beta;
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ifast = i;
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}
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else {
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// fast is already photon then check E
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G4double e = ptr->Get4Momentum().e();
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if (e > theResult.Get()->GetSecondary(ifast)->GetParticle()->Get4Momentum().e()) {
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// among photons, the highest E becomes the fastest
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ifast = i;
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}
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}
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}
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}
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G4LorentzVector dif_4p = init_4p_lab - secs_4p_lab;
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G4LorentzVector p4(0);
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if (ires == -1 && nullptr != resi_pd) {
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// Create and Add Residual Nucleus
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ires = nSecondaries;
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nSecondaries += 1;
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auto res = new G4DynamicParticle(resi_pd, dif_4p.v());
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theResult.Get()->AddSecondary(res, secID);
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p4 = res->Get4Momentum();
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if (slow > p4.beta()) {
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slow = p4.beta();
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islow = ires;
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}
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dif_4p = init_4p_lab - (secs_4p_lab + p4);
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}
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if (needOneMoreSec && oneMoreSec_pd != nullptr)
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//
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// fca: this is not a fix, this is a crash avoidance...
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// fca: the baryon number is still wrong, most probably because it
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// fca: should have been decreased, but since we could not create a particle
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// fca: we just do not add it
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//
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{
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nSecondaries += 1;
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auto one = new G4DynamicParticle(oneMoreSec_pd, dif_4p.v());
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theResult.Get()->AddSecondary(one, secID);
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p4 = one->Get4Momentum();
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if (slow > p4.beta()) {
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slow = p4.beta();
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islow = nSecondaries - 1; // Because the first is 0th, so the last becomes "nSecondaries-1"
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}
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dif_4p = init_4p_lab - (secs_4p_lab + p4);
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}
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// Which is bigger dif_p or dif_e
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if (dif_4p.v().mag() < std::abs(dif_4p.e())) {
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// Adjust p
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if (minimum_energy < dif_4p.v().mag() && dif_4p.v().mag() < 1 * MeV) {
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nSecondaries += 1;
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theResult.Get()->AddSecondary(new G4DynamicParticle(G4Gamma::Gamma(), dif_4p.v()), secID);
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}
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}
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else {
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// dif_p > dif_e
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// at first momentum
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// Move residual momentum
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p4 = theResult.Get()->GetSecondary(ires)->GetParticle()->Get4Momentum();
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theResult.Get()->GetSecondary(ires)->GetParticle()->SetMomentum(p4.v() + dif_4p.v());
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dif_4p = init_4p_lab -
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(secs_4p_lab - p4 + theResult.Get()->GetSecondary(ires)->GetParticle()->Get4Momentum());
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}
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G4double dif_e = dif_4p.e() - (dif_4p.v()).mag();
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if (dif_e > 0) {
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// create 2 gamma
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nSecondaries += 2;
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G4double e1 = (dif_4p.e() - dif_4p.v().mag()) / 2;
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if (minimum_energy < e1) {
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G4ThreeVector dir = G4RandomDirection();
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theResult.Get()->AddSecondary(new G4DynamicParticle(G4Gamma::Gamma(), e1 * dir), secID);
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theResult.Get()->AddSecondary(new G4DynamicParticle(G4Gamma::Gamma(), -e1 * dir), secID);
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}
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}
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else // dif_e < 0
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{
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// At first reduce KE of the fastest secondary;
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auto ptr = theResult.Get()->GetSecondary(ifast)->GetParticle();
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G4double ke0 = ptr->GetKineticEnergy();
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G4ThreeVector p0 = ptr->GetMomentum();
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G4ThreeVector dir = p0.unit();
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if (ke0 + dif_e > 0) {
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ptr->SetKineticEnergy(ke0 + dif_e);
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G4ThreeVector dp = p0 - theResult.Get()->GetSecondary(ifast)->GetParticle()->GetMomentum();
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G4ThreeVector p = theResult.Get()->GetSecondary(islow)->GetParticle()->GetMomentum();
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theResult.Get()->GetSecondary(islow)->GetParticle()->SetMomentum(p + dp);
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}
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}
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}
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