constants.hpp

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#ifndef CONSTANTS_HPP
#define CONSTANTS_HPP

constexpr double UNIT_CHARGE = 1.6022e-19;       
constexpr double EV_2_J=UNIT_CHARGE;             
constexpr double J_2_EV=1.0/EV_2_J;              
constexpr double PROTON_MASS = 1.6720e-27;       //< proton mass (MKS)
constexpr double PI        = 3.1415926535897932; //< pi
constexpr double TWOPI     = 6.2831853071795862; //< 2 pi

constexpr double GB_TO_BYTES = (1024.0*1024.0*1024.0);
constexpr double BYTES_TO_GB = 1.0/GB_TO_BYTES;

const double EXP_LIM = 64.0; 

#endif