LArG4BirksLaw.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef LArG4BirksLaw_h_
#define LArG4BirksLaw_h_
 
class LArG4BirksLaw {
 
 public:
 
  // Constructor.  Set the density of liquid argon and the Birk's law
  // constant K:
 
  LArG4BirksLaw(double density, double k):
    m_LArDensity(density), m_BirksLawK(k) {}
 
  // Get the K factor
  double k() const { return m_BirksLawK;}
  
  // Get the LAr Density
  double LArDensity() const { return m_LArDensity;} 
 
  //
  // Function call operator
  //
  double operator () (double dEMeV, double dXCm, double EFieldKVPerCm)  const;
  
 
 private:
  
  // Density:  g/cm^3
  double m_LArDensity;  
 
  // Birk's K  kV/cm g/(cm^2 MeV)
  double m_BirksLawK;
 
};
 
#endif