Gabriele Cosmo
195 lines
11 KiB
C++
195 lines
11 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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// $Id: G4FTFCrossSection.cc,v 1.2 2007/04/24 10:37:10 gunter Exp $
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// GEANT4 tag $Name: geant4-09-00 $
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//
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#include "G4FTFCrossSection.hh"
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G4FTFCrossSection::G4FTFCrossSection()
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{;}
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G4FTFCrossSection::~G4FTFCrossSection()
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{;}
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//**********************************************************************************************
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G4FTFCrossSection::G4FTFCrossSection(const G4ParticleDefinition * particle, G4double s)
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{
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G4int PDGcode = particle->GetPDGEncoding();
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G4int absPDGcode = std::abs(PDGcode);
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G4double Elab = (s - 2*0.88*GeV*GeV)/(2*0.939*GeV)/GeV;
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G4double Plab = std::sqrt(Elab * Elab - 0.88);
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G4double LogPlab = std::log( Plab );
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G4double sqrLogPlab = LogPlab * LogPlab;
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//G4cout<<"G4FTFCrossSection Plab "<<Plab<<G4endl;
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G4int NumberOfTargetProtons = 1; //aNucleus.GetZ(); // ??????????????????????
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G4int NumberOfTargetNeutrons = 1; //aNucleus.GetN();
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G4int NumberOfTargetNucleons = NumberOfTargetProtons + NumberOfTargetNeutrons;
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G4double Xtotal, Xelastic;
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if( absPDGcode > 1000 ) //------Projectile is baryon --------
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{
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G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + 0.522*sqrLogPlab - 4.51*LogPlab;
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G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + 0.513*sqrLogPlab - 4.27*LogPlab;
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G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
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G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
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Xtotal = ( NumberOfTargetProtons * XtotPP +
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NumberOfTargetNeutrons * XtotPN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelPP +
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NumberOfTargetNeutrons * XelPN ) / NumberOfTargetNucleons;
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}
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else if( PDGcode == 211 ) //------Projectile is PionPlus -------
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{
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G4double XtotPiP = 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab;
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G4double XtotPiN = 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab;
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G4double XelPiP = 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab;
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G4double XelPiN = 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab;
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Xtotal = ( NumberOfTargetProtons * XtotPiP +
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NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelPiP +
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NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons;
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}
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else if( PDGcode == -211 ) //------Projectile is PionMinus -------
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{
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G4double XtotPiP = 33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab;
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G4double XtotPiN = 16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab;
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G4double XelPiP = 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab;
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G4double XelPiN = 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab;
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Xtotal = ( NumberOfTargetProtons * XtotPiP +
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NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelPiP +
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NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons;
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}
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else if( PDGcode == 111 ) //------Projectile is PionZero -------
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{
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G4double XtotPiP =(16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab + //Pi+
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33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab)/2; //Pi-
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G4double XtotPiN =(33.0 + 14.0 *std::pow(Plab,-1.36) + 0.456*sqrLogPlab - 4.03*LogPlab + //Pi+
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16.4 + 19.3 *std::pow(Plab,-0.42) + 0.19 *sqrLogPlab - 0.0 *LogPlab)/2; //Pi-
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G4double XelPiP =( 0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab + //Pi+
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1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab)/2; //Pi-
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G4double XelPiN =( 1.76 + 11.2*std::pow(Plab,-0.64) + 0.043*sqrLogPlab - 0.0 *LogPlab + //Pi+
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0.0 + 11.4*std::pow(Plab,-0.40) + 0.079*sqrLogPlab - 0.0 *LogPlab)/2; //Pi-
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Xtotal = ( NumberOfTargetProtons * XtotPiP +
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NumberOfTargetNeutrons * XtotPiN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelPiP +
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NumberOfTargetNeutrons * XelPiN ) / NumberOfTargetNucleons;
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}
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else if( PDGcode == 321 ) //------Projectile is KaonPlus -------
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{
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G4double XtotKP = 18.1 + 0. *std::pow(Plab, 0. ) + 0.26 *sqrLogPlab - 1.0 *LogPlab;
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G4double XtotKN = 18.7 + 0. *std::pow(Plab, 0. ) + 0.21 *sqrLogPlab - 0.89*LogPlab;
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G4double XelKP = 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab;
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G4double XelKN = 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab;
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Xtotal = ( NumberOfTargetProtons * XtotKP +
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NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelKP +
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NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons;
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}
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else if( PDGcode ==-321 ) //------Projectile is KaonMinus ------
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{
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G4double XtotKP = 32.1 + 0. *std::pow(Plab, 0. ) + 0.66 *sqrLogPlab - 5.6 *LogPlab;
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G4double XtotKN = 25.2 + 0. *std::pow(Plab, 0. ) + 0.38 *sqrLogPlab - 2.9 *LogPlab;
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G4double XelKP = 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab;
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G4double XelKN = 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab;
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Xtotal = ( NumberOfTargetProtons * XtotKP +
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NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelKP +
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NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons;
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}
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else if( PDGcode == 311 ) //------Projectile is KaonZero ------
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{
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G4double XtotKP =( 18.1 + 0. *std::pow(Plab, 0. ) + 0.26 *sqrLogPlab - 1.0 *LogPlab + //K+
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32.1 + 0. *std::pow(Plab, 0. ) + 0.66 *sqrLogPlab - 5.6 *LogPlab)/2; //K-
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G4double XtotKN =( 18.7 + 0. *std::pow(Plab, 0. ) + 0.21 *sqrLogPlab - 0.89*LogPlab + //K+
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25.2 + 0. *std::pow(Plab, 0. ) + 0.38 *sqrLogPlab - 2.9 *LogPlab)/2; //K-
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G4double XelKP =( 5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab + //K+
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7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab)/2; //K-
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G4double XelKN =( 7.3 + 0. *std::pow(Plab,-0. ) + 0.29 *sqrLogPlab - 2.4 *LogPlab + //K+
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5.0 + 8.1*std::pow(Plab,-1.8 ) + 0.16 *sqrLogPlab - 1.3 *LogPlab)/2; //K-
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Xtotal = ( NumberOfTargetProtons * XtotKP +
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NumberOfTargetNeutrons * XtotKN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelKP +
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NumberOfTargetNeutrons * XelKN ) / NumberOfTargetNucleons;
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}
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else //------Projectile is undefined, Nucleon assumed
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{
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G4double XtotPP = 48.0 + 0. *std::pow(Plab, 0. ) + 0.522*sqrLogPlab - 4.51*LogPlab;
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G4double XtotPN = 47.3 + 0. *std::pow(Plab, 0. ) + 0.513*sqrLogPlab - 4.27*LogPlab;
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G4double XelPP = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
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G4double XelPN = 11.9 + 26.9*std::pow(Plab,-1.21) + 0.169*sqrLogPlab - 1.85*LogPlab;
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Xtotal = ( NumberOfTargetProtons * XtotPP +
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NumberOfTargetNeutrons * XtotPN ) / NumberOfTargetNucleons;
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Xelastic = ( NumberOfTargetProtons * XelPP +
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NumberOfTargetNeutrons * XelPN ) / NumberOfTargetNucleons;
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};
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SetTotalCrossSection(Xtotal);
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SetElastisCrossSection(Xelastic);
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SetInelasticCrossSection(Xtotal-Xelastic);
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//G4cout<<"G4FTFCrossSection Xt Xel "<<Xtotal<<" "<<Xelastic<<G4endl;
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//-----------------------------------------------------------------------------------
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SetSlope( Xtotal*Xtotal/16./pi/Xelastic/0.3894 ); // Slope parameter of elastic scattering
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// (GeV/c)^(-2))
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// Gaussian parametrization of
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// elastic scattering amplitude assumed
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//G4cout<<"G4FTFCrossSection Slope "<<GetSlope()<<G4endl;
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//-----------------------------------------------------------------------------------
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SetGamma0( GetSlope()*Xtotal/10./2./pi );
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//-----------------------------------------------------------------------------------
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//G4cout<<"G4FTFCrossSection Out"<<G4endl;
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}
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//**********************************************************************************************
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