Import Geant4 4.0.0 source tree
This commit is contained in:
Gabriele Cosmo
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//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
|
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * authors in the GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// G4 Low energy model: n-p scattering
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// F.W. Jones, L.G. Greeniaus, H.P. Wellisch
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#include "G4LEnp.hh"
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#include "Randomize.hh"
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#include "G4ios.hh"
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// Initialization of static data arrays:
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#include "G4LEnpData.hh"
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#include "Randomize.hh"
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G4LEnp::G4LEnp() :
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G4HadronicInteraction()
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{
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// theParticleChange.SetNumberOfSecondaries(1);
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// SetMinEnergy(10.*MeV);
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// SetMaxEnergy(1200.*MeV);
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SetMinEnergy(0.);
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SetMaxEnergy(1200.*GeV);
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}
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G4LEnp::~G4LEnp()
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{
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// theParticleChange.Clear();
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}
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G4VParticleChange*
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G4LEnp::ApplyYourself(const G4Track& aTrack, G4Nucleus& targetNucleus)
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{
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theParticleChange.Initialize(aTrack);
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const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
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G4double P = aParticle->GetTotalMomentum();
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G4double Px = aParticle->GetMomentum().x();
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G4double Py = aParticle->GetMomentum().y();
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G4double Pz = aParticle->GetMomentum().z();
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G4double ek = aParticle->GetKineticEnergy();
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G4ThreeVector theInitial = aParticle->GetMomentum();
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if (verboseLevel > 1) {
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G4double E = aParticle->GetTotalEnergy();
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G4double E0 = aParticle->GetDefinition()->GetPDGMass();
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G4double Q = aParticle->GetDefinition()->GetPDGCharge();
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G4double N = targetNucleus.GetN();
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G4double Z = targetNucleus.GetZ();
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G4cout << "G4LEnp:ApplyYourself: incident particle: "
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<< aParticle->GetDefinition()->GetParticleName() << G4endl;
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G4cout << "P = " << P/GeV << " GeV/c"
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<< ", Px = " << Px/GeV << " GeV/c"
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<< ", Py = " << Py/GeV << " GeV/c"
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<< ", Pz = " << Pz/GeV << " GeV/c" << G4endl;
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G4cout << "E = " << E/GeV << " GeV"
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<< ", kinetic energy = " << ek/GeV << " GeV"
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<< ", mass = " << E0/GeV << " GeV"
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<< ", charge = " << Q << G4endl;
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G4cout << "G4LEnp:ApplyYourself: material:" << G4endl;
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G4cout << "A = " << N
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<< ", Z = " << Z
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<< ", atomic mass "
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<< G4Proton::Proton()->GetPDGMass()/GeV << "GeV"
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<< G4endl;
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//
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// GHEISHA ADD operation to get total energy, mass, charge
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//
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E += G4Proton::Proton()->GetPDGMass();
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G4double E02 = E*E - P*P;
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E0 = sqrt(abs(E02));
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if (E02 < 0)E0 *= -1;
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Q += Z;
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G4cout << "G4LEnp:ApplyYourself: total:" << G4endl;
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G4cout << "E = " << E/GeV << " GeV"
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<< ", mass = " << E0/GeV << " GeV"
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<< ", charge = " << Q << G4endl;
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}
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// Find energy bin
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G4int je1 = 0;
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G4int je2 = NENERGY - 1;
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ek = ek/GeV;
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do {
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G4int midBin = (je1 + je2)/2;
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if (ek < elab[midBin])
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je2 = midBin;
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else
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je1 = midBin;
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} while (je2 - je1 > 1);
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// G4int j;
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//abs(ek-elab[je1]) < abs(ek-elab[je2]) ? j = je1 : j = je2;
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G4double delab = elab[je2] - elab[je1];
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// Sample the angle
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G4float sample = G4UniformRand();
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G4int ke1 = 0;
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G4int ke2 = NANGLE - 1;
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G4double dsig = sig[je2][0] - sig[je1][0];
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G4double rc = dsig/delab;
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G4double b = sig[je1][0] - rc*elab[je1];
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G4double sigint1 = rc*ek + b;
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G4double sigint2 = 0.;
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if (verboseLevel > 1) G4cout << "sample=" << sample << G4endl
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<< ke1 << " " << ke2 << " "
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<< sigint1 << " " << sigint2 << G4endl;
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do {
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G4int midBin = (ke1 + ke2)/2;
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dsig = sig[je2][midBin] - sig[je1][midBin];
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rc = dsig/delab;
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b = sig[je1][midBin] - rc*elab[je1];
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G4double sigint = rc*ek + b;
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if (sample < sigint) {
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ke2 = midBin;
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sigint2 = sigint;
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}
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else {
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ke1 = midBin;
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sigint1 = sigint;
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}
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if (verboseLevel > 1)G4cout << ke1 << " " << ke2 << " "
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<< sigint1 << " " << sigint2 << G4endl;
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} while (ke2 - ke1 > 1);
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// sigint1 and sigint2 should be recoverable from above loop
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// G4double dsig = sig[je2][ke1] - sig[je1][ke1];
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// G4double rc = dsig/delab;
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// G4double b = sig[je1][ke1] - rc*elab[je1];
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// G4double sigint1 = rc*ek + b;
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// G4double dsig = sig[je2][ke2] - sig[je1][ke2];
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// G4double rc = dsig/delab;
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// G4double b = sig[je1][ke2] - rc*elab[je1];
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// G4double sigint2 = rc*ek + b;
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dsig = sigint2 - sigint1;
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rc = 1./dsig;
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b = ke1 - rc*sigint1;
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G4double kint = rc*sample + b;
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G4double theta = (0.5 + kint)*pi/180.;
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// G4int k;
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//abs(sample-sig[j][ke1]) < abs(sample-sig[j][ke2]) ? k = ke1 : k = ke2;
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// G4double theta = (0.5 + k)*pi/180.;
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if (verboseLevel > 1) {
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G4cout << " energy bin " << je1 << " energy=" << elab[je1] << G4endl;
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G4cout << " angle bin " << kint << " angle=" << theta/degree << G4endl;
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}
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// Get the target particle
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G4DynamicParticle* targetParticle = targetNucleus.ReturnTargetParticle();
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G4double E1 = aParticle->GetTotalEnergy();
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G4double M1 = aParticle->GetDefinition()->GetPDGMass();
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G4double E2 = targetParticle->GetTotalEnergy();
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G4double M2 = targetParticle->GetDefinition()->GetPDGMass();
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G4double totalEnergy = E1 + E2;
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G4double pseudoMass = sqrt(totalEnergy*totalEnergy - P*P);
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// pseudoMass also = sqrt(M1*M1 + M2*M2 + 2*M2*E1)
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// Transform into centre of mass system
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G4double px = (M2/pseudoMass)*Px;
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G4double py = (M2/pseudoMass)*Py;
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G4double pz = (M2/pseudoMass)*Pz;
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G4double p = sqrt(px*px + py*py + pz*pz);
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if (verboseLevel > 1) {
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G4cout << " E1, M1 (GeV) " << E1/GeV << " " << M1/GeV << G4endl;
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G4cout << " E2, M2 (GeV) " << E2/GeV << " " << M2/GeV << G4endl;
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G4cout << " particle 1 momentum in CM " << px/GeV << " " << py/GeV << " "
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<< pz/GeV << " " << p/GeV << G4endl;
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}
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// First scatter w.r.t. Z axis
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G4double phi = G4UniformRand()*twopi;
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G4double pxnew = p*sin(theta)*cos(phi);
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G4double pynew = p*sin(theta)*sin(phi);
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G4double pznew = p*cos(theta);
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// Rotate according to the direction of the incident particle
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if (px*px + py*py > 0) {
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G4double cost, sint, ph, cosp, sinp, a, b, c;
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cost = pz/p;
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sint = (sqrt(abs((1-cost)*(1+cost))) + sqrt(px*px+py*py)/p)/2;
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py < 0 ? ph = 3*halfpi : ph = halfpi;
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if (abs(px) > 0.000001*GeV) ph = atan2(py,px);
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cosp = cos(ph);
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sinp = sin(ph);
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px = (cost*cosp*pxnew - sinp*pynew + sint*cosp*pznew);
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py = (cost*sinp*pxnew + cosp*pynew + sint*sinp*pznew);
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pz = (-sint*pxnew + cost*pznew);
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// G4ThreeVector it(a,b,c);
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// p0->SetMomentum(it);
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// G4ThreeVector aTargetMom = theInitial - it;
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// targetParticle->SetMomentum(aTargetMom);
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}
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else {
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px = pxnew;
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py = pynew;
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pz = pznew;
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}
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if (verboseLevel > 1) {
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G4cout << " AFTER SCATTER..." << G4endl;
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G4cout << " particle 1 momentum in CM " << px/GeV << " " << py/GeV << " "
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<< pz/GeV << " " << p/GeV << G4endl;
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}
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// Transform to lab system
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G4double E1pM2 = E1 + M2;
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G4double betaCM = P/E1pM2;
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G4double betaCMx = Px/E1pM2;
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G4double betaCMy = Py/E1pM2;
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G4double betaCMz = Pz/E1pM2;
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G4double gammaCM = E1pM2/sqrt(E1pM2*E1pM2 - P*P);
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if (verboseLevel > 1) {
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G4cout << " betaCM " << betaCMx << " " << betaCMy << " "
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<< betaCMz << " " << betaCM << G4endl;
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G4cout << " gammaCM " << gammaCM << G4endl;
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}
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// Now following GLOREN...
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G4double BETA[5], PA[5], PB[5];
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BETA[1] = -betaCMx;
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BETA[2] = -betaCMy;
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BETA[3] = -betaCMz;
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BETA[4] = gammaCM;
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//The incident particle...
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PA[1] = px;
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PA[2] = py;
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PA[3] = pz;
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PA[4] = sqrt(M1*M1 + p*p);
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G4double BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + BETA[3]*PA[3];
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G4double BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - PA[4]) * BETA[4];
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PB[1] = PA[1] + BPGAM * BETA[1];
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PB[2] = PA[2] + BPGAM * BETA[2];
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PB[3] = PA[3] + BPGAM * BETA[3];
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PB[4] = (PA[4] - BETPA) * BETA[4];
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G4DynamicParticle* newP = new G4DynamicParticle;
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newP->SetDefinition(aParticle->GetDefinition());
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newP->SetMomentum(G4ThreeVector(PB[1], PB[2], PB[3]));
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//The target particle...
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PA[1] = -px;
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PA[2] = -py;
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PA[3] = -pz;
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PA[4] = sqrt(M2*M2 + p*p);
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BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + BETA[3]*PA[3];
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BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - PA[4]) * BETA[4];
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PB[1] = PA[1] + BPGAM * BETA[1];
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PB[2] = PA[2] + BPGAM * BETA[2];
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PB[3] = PA[3] + BPGAM * BETA[3];
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PB[4] = (PA[4] - BETPA) * BETA[4];
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targetParticle->SetMomentum(G4ThreeVector(PB[1], PB[2], PB[3]));
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if (verboseLevel > 1) {
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G4cout << " particle 1 momentum in LAB "
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<< newP->GetMomentum()*(1./GeV)
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<< " " << newP->GetTotalMomentum()/GeV << G4endl;
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G4cout << " particle 2 momentum in LAB "
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<< targetParticle->GetMomentum()*(1./GeV)
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<< " " << targetParticle->GetTotalMomentum()/GeV << G4endl;
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G4cout << " TOTAL momentum in LAB "
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<< (newP->GetMomentum()+targetParticle->GetMomentum())*(1./GeV)
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<< " "
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<< (newP->GetMomentum()+targetParticle->GetMomentum()).mag()/GeV
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<< G4endl;
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}
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// charge symmetry....
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if(G4UniformRand()<.5)
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{
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theParticleChange.SetNumberOfSecondaries(1);
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theParticleChange.SetMomentumChange(newP->GetMomentumDirection());
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theParticleChange.SetEnergyChange(newP->GetKineticEnergy());
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delete newP;
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G4DynamicParticle* p1 = new G4DynamicParticle;
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p1->SetDefinition(targetParticle->GetDefinition());
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p1->SetMomentum(targetParticle->GetMomentum());
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theParticleChange.AddSecondary(p1);
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}
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else
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{
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theParticleChange.SetNumberOfSecondaries(2);
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theParticleChange.SetStatusChange(fStopAndKill);
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G4DynamicParticle * pA = new G4DynamicParticle;
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pA->SetDefinition(targetParticle->GetDefinition());
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pA->SetMomentum(newP->GetMomentum());
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G4DynamicParticle * pB = new G4DynamicParticle;
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pB->SetDefinition(newP->GetDefinition());
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pB->SetMomentum(targetParticle->GetMomentum());
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delete newP;
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theParticleChange.AddSecondary(pA);
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theParticleChange.AddSecondary(pB);
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}
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return &theParticleChange;
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}
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// end of file
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@@ -0,0 +1,372 @@
|
||||
//
|
||||
// ********************************************************************
|
||||
// * DISCLAIMER *
|
||||
// * *
|
||||
// * The following disclaimer summarizes all the specific disclaimers *
|
||||
// * of contributors to this software. The specific disclaimers,which *
|
||||
// * govern, are listed with their locations in: *
|
||||
// * http://cern.ch/geant4/license *
|
||||
// * *
|
||||
// * 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. *
|
||||
// * *
|
||||
// * This code implementation is the intellectual property of the *
|
||||
// * authors in the GEANT4 collaboration. *
|
||||
// * By copying, distributing or modifying the Program (or any work *
|
||||
// * based on the Program) you indicate your acceptance of this *
|
||||
// * statement, and all its terms. *
|
||||
// ********************************************************************
|
||||
//
|
||||
|
||||
// G4 Low energy model: n-n or p-p scattering
|
||||
// F.W. Jones, L.G. Greeniaus, H.P. Wellisch
|
||||
|
||||
|
||||
#include "G4LEpp.hh"
|
||||
#include "Randomize.hh"
|
||||
#include "G4ios.hh"
|
||||
|
||||
// Initialization of static data arrays:
|
||||
#include "G4LEppData.hh"
|
||||
|
||||
G4LEpp::G4LEpp() :
|
||||
G4HadronicInteraction()
|
||||
{
|
||||
// theParticleChange.SetNumberOfSecondaries(1);
|
||||
// SetMinEnergy(10.*MeV);
|
||||
// SetMaxEnergy(1200.*MeV);
|
||||
|
||||
SetCoulombSuppression(1);
|
||||
|
||||
SetMinEnergy(0.);
|
||||
SetMaxEnergy(1200.*GeV);
|
||||
}
|
||||
|
||||
G4LEpp::~G4LEpp()
|
||||
{
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||||
// theParticleChange.Clear();
|
||||
}
|
||||
|
||||
|
||||
void
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||||
G4LEpp::SetCoulombSuppression(G4int State)
|
||||
{
|
||||
if (State) {
|
||||
for(G4int i=0; i<NANGLE; i++)
|
||||
{
|
||||
sig[i] = Sig[i];
|
||||
}
|
||||
elab = Elab;
|
||||
}
|
||||
else {
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||||
for(G4int i=0; i<NANGLE; i++)
|
||||
{
|
||||
sig[i] = SigCoul[i];
|
||||
}
|
||||
elab = ElabCoul;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
G4VParticleChange*
|
||||
G4LEpp::ApplyYourself(const G4Track& aTrack, G4Nucleus& targetNucleus)
|
||||
{
|
||||
theParticleChange.Initialize(aTrack);
|
||||
|
||||
const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
|
||||
|
||||
G4double P = aParticle->GetTotalMomentum();
|
||||
G4double Px = aParticle->GetMomentum().x();
|
||||
G4double Py = aParticle->GetMomentum().y();
|
||||
G4double Pz = aParticle->GetMomentum().z();
|
||||
G4double ek = aParticle->GetKineticEnergy();
|
||||
G4ThreeVector theInitial = aParticle->GetMomentum();
|
||||
|
||||
if (verboseLevel > 1) {
|
||||
G4double E = aParticle->GetTotalEnergy();
|
||||
G4double E0 = aParticle->GetDefinition()->GetPDGMass();
|
||||
G4double Q = aParticle->GetDefinition()->GetPDGCharge();
|
||||
G4double N = targetNucleus.GetN();
|
||||
G4double Z = targetNucleus.GetZ();
|
||||
G4cout << "G4LEpp:ApplyYourself: incident particle: "
|
||||
<< aParticle->GetDefinition()->GetParticleName() << G4endl;
|
||||
G4cout << "P = " << P/GeV << " GeV/c"
|
||||
<< ", Px = " << Px/GeV << " GeV/c"
|
||||
<< ", Py = " << Py/GeV << " GeV/c"
|
||||
<< ", Pz = " << Pz/GeV << " GeV/c" << G4endl;
|
||||
G4cout << "E = " << E/GeV << " GeV"
|
||||
<< ", kinetic energy = " << ek/GeV << " GeV"
|
||||
<< ", mass = " << E0/GeV << " GeV"
|
||||
<< ", charge = " << Q << G4endl;
|
||||
G4cout << "G4LEpp:ApplyYourself: material:" << G4endl;
|
||||
G4cout << "A = " << N
|
||||
<< ", Z = " << Z
|
||||
<< ", atomic mass "
|
||||
<< G4Proton::Proton()->GetPDGMass()/GeV << "GeV"
|
||||
<< G4endl;
|
||||
//
|
||||
// GHEISHA ADD operation to get total energy, mass, charge
|
||||
//
|
||||
E += G4Proton::Proton()->GetPDGMass();
|
||||
G4double E02 = E*E - P*P;
|
||||
E0 = sqrt(abs(E02));
|
||||
if (E02 < 0)E0 *= -1;
|
||||
Q += Z;
|
||||
G4cout << "G4LEpp:ApplyYourself: total:" << G4endl;
|
||||
G4cout << "E = " << E/GeV << " GeV"
|
||||
<< ", mass = " << E0/GeV << " GeV"
|
||||
<< ", charge = " << Q << G4endl;
|
||||
}
|
||||
|
||||
// Find energy bin
|
||||
|
||||
G4int je1 = 0;
|
||||
G4int je2 = NENERGY - 1;
|
||||
ek = ek/GeV;
|
||||
do {
|
||||
G4int midBin = (je1 + je2)/2;
|
||||
if (ek < elab[midBin])
|
||||
je2 = midBin;
|
||||
else
|
||||
je1 = midBin;
|
||||
} while (je2 - je1 > 1);
|
||||
// G4int j;
|
||||
//abs(ek-elab[je1]) < abs(ek-elab[je2]) ? j = je1 : j = je2;
|
||||
G4double delab = elab[je2] - elab[je1];
|
||||
|
||||
// Sample the angle
|
||||
|
||||
G4float sample = G4UniformRand();
|
||||
G4int ke1 = 0;
|
||||
G4int ke2 = NANGLE - 1;
|
||||
G4double dsig = sig[je2][0] - sig[je1][0];
|
||||
G4double rc = dsig/delab;
|
||||
G4double b = sig[je1][0] - rc*elab[je1];
|
||||
G4double sigint1 = rc*ek + b;
|
||||
G4double sigint2 = 0.;
|
||||
|
||||
if (verboseLevel > 1) G4cout << "sample=" << sample << G4endl
|
||||
<< ke1 << " " << ke2 << " "
|
||||
<< sigint1 << " " << sigint2 << G4endl;
|
||||
|
||||
do {
|
||||
G4int midBin = (ke1 + ke2)/2;
|
||||
dsig = sig[je2][midBin] - sig[je1][midBin];
|
||||
rc = dsig/delab;
|
||||
b = sig[je1][midBin] - rc*elab[je1];
|
||||
G4double sigint = rc*ek + b;
|
||||
if (sample < sigint) {
|
||||
ke2 = midBin;
|
||||
sigint2 = sigint;
|
||||
}
|
||||
else {
|
||||
ke1 = midBin;
|
||||
sigint1 = sigint;
|
||||
}
|
||||
if (verboseLevel > 1)G4cout << ke1 << " " << ke2 << " "
|
||||
<< sigint1 << " " << sigint2 << G4endl;
|
||||
} while (ke2 - ke1 > 1);
|
||||
|
||||
// sigint1 and sigint2 should be recoverable from above loop
|
||||
|
||||
// G4double dsig = sig[je2][ke1] - sig[je1][ke1];
|
||||
// G4double rc = dsig/delab;
|
||||
// G4double b = sig[je1][ke1] - rc*elab[je1];
|
||||
// G4double sigint1 = rc*ek + b;
|
||||
|
||||
// G4double dsig = sig[je2][ke2] - sig[je1][ke2];
|
||||
// G4double rc = dsig/delab;
|
||||
// G4double b = sig[je1][ke2] - rc*elab[je1];
|
||||
// G4double sigint2 = rc*ek + b;
|
||||
|
||||
dsig = sigint2 - sigint1;
|
||||
rc = 1./dsig;
|
||||
b = ke1 - rc*sigint1;
|
||||
G4double kint = rc*sample + b;
|
||||
G4double theta = (0.5 + kint)*pi/180.;
|
||||
|
||||
// G4int k;
|
||||
//abs(sample-sig[j][ke1]) < abs(sample-sig[j][ke2]) ? k = ke1 : k = ke2;
|
||||
// G4double theta = (0.5 + k)*pi/180.;
|
||||
|
||||
if (verboseLevel > 1) {
|
||||
G4cout << " energy bin " << je1 << " energy=" << elab[je1] << G4endl;
|
||||
G4cout << " angle bin " << kint << " angle=" << theta/degree << G4endl;
|
||||
}
|
||||
|
||||
|
||||
// Get the target particle
|
||||
|
||||
G4DynamicParticle* targetParticle = targetNucleus.ReturnTargetParticle();
|
||||
|
||||
G4double E1 = aParticle->GetTotalEnergy();
|
||||
G4double M1 = aParticle->GetDefinition()->GetPDGMass();
|
||||
G4double E2 = targetParticle->GetTotalEnergy();
|
||||
G4double M2 = targetParticle->GetDefinition()->GetPDGMass();
|
||||
G4double totalEnergy = E1 + E2;
|
||||
G4double pseudoMass = sqrt(totalEnergy*totalEnergy - P*P);
|
||||
// pseudoMass also = sqrt(M1*M1 + M2*M2 + 2*M2*E1)
|
||||
|
||||
// Transform into centre of mass system
|
||||
|
||||
G4double px = (M2/pseudoMass)*Px;
|
||||
G4double py = (M2/pseudoMass)*Py;
|
||||
G4double pz = (M2/pseudoMass)*Pz;
|
||||
G4double p = sqrt(px*px + py*py + pz*pz);
|
||||
|
||||
if (verboseLevel > 1) {
|
||||
G4cout << " E1, M1 (GeV) " << E1/GeV << " " << M1/GeV << G4endl;
|
||||
G4cout << " E2, M2 (GeV) " << E2/GeV << " " << M2/GeV << G4endl;
|
||||
G4cout << " particle 1 momentum in CM " << px/GeV << " " << py/GeV << " "
|
||||
<< pz/GeV << " " << p/GeV << G4endl;
|
||||
}
|
||||
|
||||
// First scatter w.r.t. Z axis
|
||||
G4double phi = G4UniformRand()*twopi;
|
||||
G4double pxnew = p*sin(theta)*cos(phi);
|
||||
G4double pynew = p*sin(theta)*sin(phi);
|
||||
G4double pznew = p*cos(theta);
|
||||
|
||||
// Rotate according to the direction of the incident particle
|
||||
if (px*px + py*py > 0) {
|
||||
G4double cost, sint, ph, cosp, sinp, a, b, c;
|
||||
cost = pz/p;
|
||||
sint = (sqrt(abs((1-cost)*(1+cost))) + sqrt(px*px+py*py)/p)/2;
|
||||
py < 0 ? ph = 3*halfpi : ph = halfpi;
|
||||
if (abs(px) > 0.000001*GeV) ph = atan2(py,px);
|
||||
cosp = cos(ph);
|
||||
sinp = sin(ph);
|
||||
px = (cost*cosp*pxnew - sinp*pynew + sint*cosp*pznew);
|
||||
py = (cost*sinp*pxnew + cosp*pynew + sint*sinp*pznew);
|
||||
pz = (-sint*pxnew + cost*pznew);
|
||||
// G4ThreeVector it(a,b,c);
|
||||
// p0->SetMomentum(it);
|
||||
// G4ThreeVector aTargetMom = theInitial - it;
|
||||
// targetParticle->SetMomentum(aTargetMom);
|
||||
}
|
||||
else {
|
||||
px = pxnew;
|
||||
py = pynew;
|
||||
pz = pznew;
|
||||
}
|
||||
|
||||
if (verboseLevel > 1) {
|
||||
G4cout << " AFTER SCATTER..." << G4endl;
|
||||
G4cout << " particle 1 momentum in CM " << px/GeV << " " << py/GeV << " "
|
||||
<< pz/GeV << " " << p/GeV << G4endl;
|
||||
}
|
||||
|
||||
// Transform to lab system
|
||||
|
||||
G4double E1pM2 = E1 + M2;
|
||||
G4double betaCM = P/E1pM2;
|
||||
G4double betaCMx = Px/E1pM2;
|
||||
G4double betaCMy = Py/E1pM2;
|
||||
G4double betaCMz = Pz/E1pM2;
|
||||
G4double gammaCM = E1pM2/sqrt(E1pM2*E1pM2 - P*P);
|
||||
|
||||
if (verboseLevel > 1) {
|
||||
G4cout << " betaCM " << betaCMx << " " << betaCMy << " "
|
||||
<< betaCMz << " " << betaCM << G4endl;
|
||||
G4cout << " gammaCM " << gammaCM << G4endl;
|
||||
}
|
||||
|
||||
// Now following GLOREN...
|
||||
|
||||
G4double BETA[5], PA[5], PB[5];
|
||||
BETA[1] = -betaCMx;
|
||||
BETA[2] = -betaCMy;
|
||||
BETA[3] = -betaCMz;
|
||||
BETA[4] = gammaCM;
|
||||
|
||||
//The incident particle...
|
||||
|
||||
PA[1] = px;
|
||||
PA[2] = py;
|
||||
PA[3] = pz;
|
||||
PA[4] = sqrt(M1*M1 + p*p);
|
||||
|
||||
G4double BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + BETA[3]*PA[3];
|
||||
G4double BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - PA[4]) * BETA[4];
|
||||
|
||||
PB[1] = PA[1] + BPGAM * BETA[1];
|
||||
PB[2] = PA[2] + BPGAM * BETA[2];
|
||||
PB[3] = PA[3] + BPGAM * BETA[3];
|
||||
PB[4] = (PA[4] - BETPA) * BETA[4];
|
||||
|
||||
G4DynamicParticle* newP = new G4DynamicParticle;
|
||||
newP->SetDefinition(aParticle->GetDefinition());
|
||||
newP->SetMomentum(G4ThreeVector(PB[1], PB[2], PB[3]));
|
||||
|
||||
|
||||
//The target particle...
|
||||
|
||||
PA[1] = -px;
|
||||
PA[2] = -py;
|
||||
PA[3] = -pz;
|
||||
PA[4] = sqrt(M2*M2 + p*p);
|
||||
|
||||
BETPA = BETA[1]*PA[1] + BETA[2]*PA[2] + BETA[3]*PA[3];
|
||||
BPGAM = (BETPA * BETA[4]/(BETA[4] + 1.) - PA[4]) * BETA[4];
|
||||
|
||||
PB[1] = PA[1] + BPGAM * BETA[1];
|
||||
PB[2] = PA[2] + BPGAM * BETA[2];
|
||||
PB[3] = PA[3] + BPGAM * BETA[3];
|
||||
PB[4] = (PA[4] - BETPA) * BETA[4];
|
||||
|
||||
targetParticle->SetMomentum(G4ThreeVector(PB[1], PB[2], PB[3]));
|
||||
|
||||
G4double ektotal = newP->GetKineticEnergy() +
|
||||
targetParticle->GetKineticEnergy();
|
||||
|
||||
if (verboseLevel > 1) {
|
||||
G4cout << " particle 1 momentum in LAB "
|
||||
<< newP->GetMomentum()*(1./GeV)
|
||||
<< " " << newP->GetTotalMomentum()/GeV << G4endl;
|
||||
G4cout << " particle 2 momentum in LAB "
|
||||
<< targetParticle->GetMomentum()*(1./GeV)
|
||||
<< " " << targetParticle->GetTotalMomentum()/GeV << G4endl;
|
||||
G4cout << " TOTAL momentum in LAB "
|
||||
<< (newP->GetMomentum()+targetParticle->GetMomentum())*(1./GeV)
|
||||
<< " "
|
||||
<< (newP->GetMomentum()+targetParticle->GetMomentum()).mag()/GeV
|
||||
<< G4endl;
|
||||
}
|
||||
|
||||
// if (theta < pi/2.) {
|
||||
theParticleChange.SetNumberOfSecondaries(1);
|
||||
// G4double p = newP->GetMomentum().mag();
|
||||
// G4ThreeVector m = newP->GetMomentum();
|
||||
// if (p > DBL_MIN)
|
||||
// theParticleChange.SetMomentumChange(m.x()/p, m.y()/p, m.z()/p);
|
||||
// else
|
||||
// theParticleChange.SetMomentumChange(0., 0., 0.);
|
||||
|
||||
theParticleChange.SetMomentumDirectionChange(
|
||||
newP->GetMomentumDirection());
|
||||
theParticleChange.SetEnergyChange(newP->GetKineticEnergy());
|
||||
delete newP;
|
||||
|
||||
// }
|
||||
// else {
|
||||
// // charge exchange
|
||||
// theParticleChange.SetNumberOfSecondaries(2);
|
||||
// theParticleChange.AddSecondary(newP);
|
||||
// theParticleChange.SetStatusChange(fStopAndKill);
|
||||
// // theParticleChange.SetEnergyChange(0.0);
|
||||
// }
|
||||
|
||||
// Recoil particle
|
||||
G4DynamicParticle* p1 = new G4DynamicParticle;
|
||||
p1->SetDefinition(targetParticle->GetDefinition());
|
||||
p1->SetMomentum(targetParticle->GetMomentum());
|
||||
theParticleChange.AddSecondary(p1);
|
||||
|
||||
|
||||
return &theParticleChange;
|
||||
}
|
||||
|
||||
// end of file
|
||||
Reference in New Issue
Block a user