mirror of
https://github.com/gwm17/catima.git
synced 2024-11-26 12:08:52 -05:00
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
#ifndef CONSTANTS_H
|
|
#define CONSTANTS_H
|
|
#include <limits>
|
|
#include "catima/build_config.h"
|
|
namespace catima {
|
|
|
|
constexpr double Ezero = 1E-3; // lowest E to calculate, below taken as 0
|
|
constexpr double logEmin = -3; // log of minimum energy
|
|
constexpr double logEmax = 7.0; // log of max energy
|
|
constexpr int max_datapoints = 500; // how many datapoints between logEmin and logEmax
|
|
constexpr int max_storage_data = 60; // number of datapoints which can be stored in cache
|
|
constexpr double numeric_epsilon = std::numeric_limits<double>::epsilon();
|
|
|
|
/// required integration precision (relative units)
|
|
/*
|
|
constexpr double int_eps_range = 0.001;
|
|
constexpr double int_eps_range_str = 0.001;
|
|
constexpr double int_eps_ang_str = 0.01;
|
|
constexpr double int_eps_tof = 0.01;
|
|
*/
|
|
|
|
constexpr double thin_target_limit = 1 - 1e-3;
|
|
#ifdef REACTIONS
|
|
constexpr double emin_reaction = 30.0;
|
|
constexpr bool reactions = true;
|
|
#else
|
|
constexpr bool reactions = false;
|
|
#endif
|
|
|
|
constexpr double PI = 3.1415926535897932384626433832795;
|
|
constexpr double Avogadro = 6.022140857; // 10^23
|
|
constexpr double electron_mass = 0.510998928; // MeV/c^2
|
|
constexpr double atomic_mass_unit = 931.4940954; // MeV/c^2
|
|
constexpr double classical_electron_radius = 2.8179403227; //fm
|
|
constexpr double fine_structure = 1/137.035999139;
|
|
constexpr double fine_structure_inverted = 1/fine_structure;
|
|
constexpr double c_light = 299.792458; //Mm/s
|
|
constexpr double bohr_velocity = 2.19 / c_light; // in c unit
|
|
constexpr double hbar = 6.582119514; // in eV*s * 10^-16
|
|
|
|
constexpr double dedx_constant = 0.3070749187; //4*pi*Na*me*c^2*r_e^2 //MeV cm^2
|
|
constexpr double domega2dx_constant = dedx_constant*electron_mass; //4*pi*Na*me*c^2*r_e^2 //MeV^2 cm^2
|
|
|
|
|
|
// units //
|
|
namespace units{
|
|
constexpr double g = 1.0;
|
|
constexpr double mg = 1000.0;
|
|
constexpr double cm3 = 1.0;
|
|
constexpr double cm = 1.0;
|
|
constexpr double mm = 10.;
|
|
constexpr double keV = 1000.0;
|
|
constexpr double ns = 1.0;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
#endif
|