Reconstruction/TrkReco/include/TrkReco/RkFitMaterial.h

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//-----------------------------------------------------------------------
//------------------------------------------------------------------------
#ifndef _DEFINE_MATERIAL_H_
#define _DEFINE_MATERIAL_H_
 
class RkFitMaterial {
  double rza_; // density * (atomic number) / weight
  double isq_; // mean excitation potential ** 2
  double x0_;  // radiation length
  double z_;
 
public:
  /// Constructor
  RkFitMaterial() {}
  RkFitMaterial( double z, double a, double i, double rho, double x0 );
  RkFitMaterial( const RkFitMaterial& mat );
  /// Calculate energy loss
  double dE( double mass, double path, double p ) const;
 
  /// Calculate Multiple Scattering angle
  double mcs_angle( double mass, double path, double p ) const;
 
  /// Calculate the straggling of energy loss
  double del_E( double mass, double path, double p ) const;
 
  /// Extractor
  double X0( void ) const { return x0_; }
};
 
#endif