Gabriele Cosmo
327 lines
8.4 KiB
C++
327 lines
8.4 KiB
C++
//
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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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// * 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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//
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//
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// $Id: G4KineticTrack.hh,v 1.0 1998/05/20
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// -----------------------------------------------------------------------------
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// GEANT 4 class header file
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//
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// History: first implementation, A. Feliciello, 20th May 1998
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// -----------------------------------------------------------------------------
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#ifndef G4KineticTrack_h
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#define G4KineticTrack_h 1
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#include "globals.hh"
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#include "G4ios.hh"
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#include "Randomize.hh"
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#include "G4ThreeVector.hh"
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#include "G4LorentzVector.hh"
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#include "G4VKineticNucleon.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4VDecayChannel.hh"
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class G4KineticTrackVector;
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class G4KineticTrack : public G4VKineticNucleon
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{
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public:
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G4KineticTrack();
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G4KineticTrack(const G4KineticTrack& right);
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G4KineticTrack(G4ParticleDefinition* aDefinition,
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G4double aFormationTime,
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G4ThreeVector aPosition,
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G4LorentzVector& a4Momentum);
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~G4KineticTrack();
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const G4KineticTrack& operator=(const G4KineticTrack& right);
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G4int operator==(const G4KineticTrack& right) const;
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G4int operator!=(const G4KineticTrack& right) const;
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G4ParticleDefinition* GetDefinition() const;
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void SetDefinition(G4ParticleDefinition* aDefinition);
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G4double GetFormationTime() const;
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void SetFormationTime(G4double aFormationTime);
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const G4ThreeVector& GetPosition() const;
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void SetPosition(const G4ThreeVector aPosition);
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const G4LorentzVector& Get4Momentum() const;
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void Set4Momentum(const G4LorentzVector& a4Momentum);
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void Update4Momentum(G4double aEnergy); // update E and p, not changing mass
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void Update4Momentum(const G4ThreeVector & aMomentum); // idem
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const G4LorentzVector& GetInitialCoordinates() const;
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G4double SampleResidualLifetime();
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G4KineticTrackVector* Decay();
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// LB move to public (before was private) LB
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G4double* GetActualWidth() const;
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G4double GetActualMass() const;
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G4int GetnChannels() const;
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private:
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void SetnChannels(const G4int aChannel);
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void SetActualWidth(G4double* anActualWidth);
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G4double EvaluateTotalActualWidth();
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G4double EvaluateCMMomentum (const G4double mass,
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const G4double* m_ij) const;
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G4double IntegrateCMMomentum(const G4double lowerLimit) const;
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G4double IntegrateCMMomentum(const G4double lowerLimit ,const G4double polemass) const;
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G4double IntegrateCMMomentum2() const;
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public:
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G4double BrWig(const G4double Gamma,
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const G4double rmass,
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const G4double mass) const;
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private:
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G4double IntegrandFunction1 (G4double xmass) const;
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G4double IntegrandFunction2 (G4double xmass) const;
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G4double IntegrandFunction3 (G4double xmass) const;
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G4double IntegrandFunction4 (G4double xmass) const;
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public:
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// friend G4double IntegrandFunction3 (G4double xmass);
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// friend G4double IntegrandFunction4 (G4double xmass);
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// LB new variable created LB
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G4int chosench;
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private:
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G4ParticleDefinition* theDefinition;
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G4double theFormationTime;
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G4ThreeVector thePosition;
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G4LorentzVector the4Momentum;
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G4LorentzVector theInitialCoordinates;
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G4int nChannels;
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G4double theActualMass;
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G4double* theActualWidth;
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private:
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// Temporary storage for daughter masses and widths
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// (needed because Integrand Function cannot take > 1 argument)
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G4double* theDaughterMass;
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G4double* theDaughterWidth;
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};
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// Class G4KineticTrack
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inline G4ParticleDefinition* G4KineticTrack::GetDefinition() const
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{
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return theDefinition;
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}
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inline void G4KineticTrack::SetDefinition(G4ParticleDefinition* aDefinition)
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{
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theDefinition = aDefinition;
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}
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inline G4double G4KineticTrack::GetFormationTime() const
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{
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return theFormationTime;
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}
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inline void G4KineticTrack::SetFormationTime(G4double aFormationTime)
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{
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theFormationTime = aFormationTime;
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}
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inline const G4ThreeVector& G4KineticTrack::GetPosition() const
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{
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return thePosition;
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}
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inline void G4KineticTrack::SetPosition(const G4ThreeVector aPosition)
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{
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thePosition = aPosition;
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}
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inline const G4LorentzVector& G4KineticTrack::Get4Momentum() const
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{
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return the4Momentum;
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}
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inline void G4KineticTrack::Set4Momentum(const G4LorentzVector& a4Momentum)
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{
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the4Momentum = a4Momentum;
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}
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inline void G4KineticTrack::Update4Momentum(G4double aEnergy)
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{
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G4double newP=0;
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if ( aEnergy > GetActualMass() )
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{
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newP = sqrt(sqr(aEnergy) - the4Momentum.mag2());
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} else
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{
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aEnergy=GetActualMass();
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}
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the4Momentum = G4LorentzVector(newP*the4Momentum.vect().unit(), aEnergy);
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}
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inline void G4KineticTrack::Update4Momentum(const G4ThreeVector & aMomentum)
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{
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G4double newE=sqrt(the4Momentum.mag2() + aMomentum.mag2());
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the4Momentum = G4LorentzVector(aMomentum, newE);
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}
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inline const G4LorentzVector& G4KineticTrack::GetInitialCoordinates() const
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{
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return theInitialCoordinates;
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}
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inline G4double G4KineticTrack::GetActualMass() const
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{
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G4ThreeVector theMomentum = the4Momentum.vect();
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G4double theMomentum2 = theMomentum.mag2();
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G4double theTotalEnergy = the4Momentum.e();
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G4double theMass = sqrt(abs(theTotalEnergy * theTotalEnergy - theMomentum2));
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return theMass;
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}
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inline G4int G4KineticTrack::GetnChannels() const
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{
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return nChannels;
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}
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inline void G4KineticTrack::SetnChannels(const G4int numberOfChannels)
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{
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nChannels = numberOfChannels;
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}
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inline G4double* G4KineticTrack::GetActualWidth() const
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{
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return theActualWidth;
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}
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inline void G4KineticTrack::SetActualWidth(G4double* anActualWidth)
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{
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theActualWidth = anActualWidth;
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}
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inline G4double G4KineticTrack::EvaluateTotalActualWidth()
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{
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G4int index;
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G4double theTotalActualWidth = 0.0;
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for (index = nChannels - 1; index >= 0; index--)
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{
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theTotalActualWidth += theActualWidth[index];
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}
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return theTotalActualWidth;
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}
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inline G4double G4KineticTrack::SampleResidualLifetime()
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{
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G4double theTotalActualWidth = this->EvaluateTotalActualWidth();
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G4double tau = hbar_Planck * (-1.0 / theTotalActualWidth);
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G4double theResidualLifetime = tau * log(G4UniformRand());
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return theResidualLifetime*the4Momentum.gamma();
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}
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inline G4double G4KineticTrack::EvaluateCMMomentum(const G4double m,
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const G4double* m_ij) const
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{
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G4double theCMMomentum;
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if((m_ij[0]+m_ij[1])<m)
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theCMMomentum = 1 / (2 * m) *
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sqrt (((m * m) - (m_ij[0] + m_ij[1]) * (m_ij[0] + m_ij[1])) *
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((m * m) - (m_ij[0] - m_ij[1]) * (m_ij[0] - m_ij[1])));
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else
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theCMMomentum=0.;
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return theCMMomentum;
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}
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inline G4double G4KineticTrack::BrWig(const G4double Gamma, const G4double rmass, const G4double mass) const
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{
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G4double Norm = twopi;
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return (Gamma/((mass-rmass)*(mass-rmass)+Gamma*Gamma/4.))/Norm;
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}
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#endif
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