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stm_study_201611/listings/G4EmCaptureCascade.cc
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stm_study_201611/listings/G4EmCaptureCascade.cc
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//
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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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// $Id: G4EmCaptureCascade.cc 101422 2016-11-17 10:41:23Z gcosmo $
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//
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//-----------------------------------------------------------------------------
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//
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// GEANT4 Class file
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//
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// File name: G4EmCaptureCascade
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//
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// Author: V.Ivanchenko (Vladimir.Ivantchenko@cern.ch)
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//
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// Creation date: 22 April 2012 on base of G4MuMinusCaptureCascade
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//
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//
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//-----------------------------------------------------------------------------
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//
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// Modifications:
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//
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//-----------------------------------------------------------------------------
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#include "G4EmCaptureCascade.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "Randomize.hh"
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#include "G4MuonMinus.hh"
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#include "G4Electron.hh"
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#include "G4Gamma.hh"
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#include "G4NucleiProperties.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4EmCaptureCascade::G4EmCaptureCascade()
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: G4HadronicInteraction("emCaptureCascade")
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{
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theElectron = G4Electron::Electron();
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theGamma = G4Gamma::Gamma();
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fMuMass = G4MuonMinus::MuonMinus()->GetPDGMass();
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fTime = 0.0;
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// Calculate the Energy of K Mesoatom Level for this Element using
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// the Energy of Hydrogen Atom taken into account finite size of the
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// nucleus
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static const G4int nlevels = 28;
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static const G4int listK[nlevels] = {
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1, 2, 4, 6, 8, 11, 14, 17, 18, 21, 24,
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26, 29, 32, 38, 40, 41, 44, 49, 53, 55,
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60, 65, 70, 75, 81, 85, 92};
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static const G4double listKEnergy[nlevels] = {
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0.00275, 0.011, 0.043, 0.098, 0.173, 0.326,
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0.524, 0.765, 0.853, 1.146, 1.472,
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1.708, 2.081, 2.475, 3.323, 3.627,
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3.779, 4.237, 5.016, 5.647, 5.966,
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6.793, 7.602, 8.421, 9.249, 10.222,
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10.923,11.984};
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fKLevelEnergy[0] = 0.0;
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fKLevelEnergy[1] = listKEnergy[0];
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G4int idx = 1;
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for(G4int i=1; i<nlevels; ++i) {
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G4int z1 = listK[idx];
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G4int z2 = listK[i];
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if(z1+1 < z2) {
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G4double dz = G4double(z2 - z1);
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G4double y1 = listKEnergy[idx]/G4double(z1*z1);
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G4double y2 = listKEnergy[i]/G4double(z2*z2);
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for(G4int z=z1+1; z<z2; ++z) {
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fKLevelEnergy[z] = (y1 + (y2 - y1)*(z - z1)/dz)*z*z;
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}
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}
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fKLevelEnergy[z2] = listKEnergy[i];
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idx = i;
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}
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for(G4int i = 0; i<14; ++i) { fLevelEnergy[i] = 0.0; }
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4EmCaptureCascade::~G4EmCaptureCascade()
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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G4HadFinalState*
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G4EmCaptureCascade::ApplyYourself(const G4HadProjectile& projectile,
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G4Nucleus& targetNucleus)
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{
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result.Clear();
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result.SetStatusChange(isAlive);
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fTime = projectile.GetGlobalTime();
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G4int Z = targetNucleus.GetZ_asInt();
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G4int A = targetNucleus.GetA_asInt();
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G4double massA = G4NucleiProperties::GetNuclearMass(A, Z);
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G4double mass = fMuMass * massA / (fMuMass + massA) ;
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G4double e = 13.6 * eV * (Z * Z) * mass/ electron_mass_c2;
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// precise corrections of energy only for K-shell
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fLevelEnergy[0] = fKLevelEnergy[std::min(Z, 92)];
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for(G4int i=1; i<14; ++i) {
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fLevelEnergy[i] = e/(G4double)((i+1)*(i+1));
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}
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G4int nElec = Z;
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G4int nAuger = 1;
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G4int nLevel = 13;
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G4double pGamma = (Z*Z*Z*Z);
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// Capture on 14-th level
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G4double edep = fLevelEnergy[13];
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AddNewParticle(theElectron,edep);
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G4double deltaE;
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// Emit new photon or electron
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// Simplified model for probabilities
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// N.C.Mukhopadhyay Phy. Rep. 30 (1977) 1.
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do {
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// case of Auger electrons
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if((nAuger < nElec) && ((pGamma + 10000.0) * G4UniformRand() < 10000.0) ) {
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++nAuger;
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deltaE = fLevelEnergy[nLevel-1] - fLevelEnergy[nLevel];
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--nLevel;
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AddNewParticle(theElectron, deltaE);
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} else {
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// Case of photon cascade, probabilities from
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// C.S.Wu and L.Wilets, Ann. Rev. Nuclear Sci. 19 (1969) 527.
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G4double var = (10.0 + G4double(nLevel - 1) ) * G4UniformRand();
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G4int iLevel = nLevel - 1 ;
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if(var > 10.0) iLevel -= G4int(var-10.0) + 1;
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if( iLevel < 0 ) iLevel = 0;
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deltaE = fLevelEnergy[iLevel] - fLevelEnergy[nLevel];
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nLevel = iLevel;
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AddNewParticle(theGamma, deltaE);
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}
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edep += deltaE;
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// Loop checking, 06-Aug-2015, Vladimir Ivanchenko
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} while( nLevel > 0 );
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result.SetLocalEnergyDeposit(edep);
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return &result;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void G4EmCaptureCascade::ModelDescription(std::ostream& outFile) const
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{
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outFile << "Simulation of electromagnetic cascade from capture level"
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<< " to K-shell of the mesonic atom\n."
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<< "Probabilities of gamma and Auger transitions from\n"
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<< " N.C.Mukhopadhyay Phys. Rep. 30 (1977) 1.\n";
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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10
stm_study_201611/listings/code_dir_tree.sh
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10
stm_study_201611/listings/code_dir_tree.sh
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@@ -0,0 +1,10 @@
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@mu2egpvm02:STM_study_201611 namtran $ pwd
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/mu2e/app/users/namtran/STM_study_201611
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@mu2egpvm02:STM_study_201611 namtran $ tree -L 1
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.
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|-- analysis
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|-- script
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|-- step00
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`-- step01
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