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// -*- Mode: C++; tab-width: 2; -*-
// vi: set ts=2:
//
// $Id: constants.C,v 1.6 2002/02/27 12:20:33 sturm Exp $
#include <BALL/COMMON/constants.h>
namespace BALL
{
namespace Constants
{
// EPSILON (used for comparisons)
double EPSILON = 1e-6;
// PI
const double PI = 3.14159265358979323846;
// Euler's number - base of the natural logarithm
const double E = 2.718281828459045235;
// Elementary charge.
const double ELEMENTARY_CHARGE = 1.60217738E-19; // C
/// Elementary charge (alias)
const double e0 = ELEMENTARY_CHARGE;
// Electron mass.
const double ELECTRON_MASS = 9.1093897E-31; // kg
// Proton mass.
const double PROTON_MASS = 1.6726230E-27; // kg
// Neutron mass.
const double NEUTRON_MASS = 1.6749286E-27; // kg
// Avogadro constant.
const double AVOGADRO = 6.0221367E+23; // 1 / mol
// Avogadro constant (alias)
const double NA = AVOGADRO;
// Avogadro constant (alias)
const double MOL = AVOGADRO;
// Boltzmann constant.
const double BOLTZMANN = 1.380657E-23; // J / K
// Boltzmann constant (alias)
const double k = BOLTZMANN;
// Planck constant.
const double PLANCK = 6.6260754E-34; // J * sec
// Planck constant (alias)
const double h = PLANCK;
// Gas constant (= NA * k)
const double GAS_CONSTANT = NA * k;
// Gas constant (alias)
const double R = GAS_CONSTANT;
// Faraday constant (= NA * e0)
const double FARADAY = NA * e0;
// Faraday constant (alias)
const double F = FARADAY;
// Bohr radius.
const double BOHR_RADIUS = 5.29177249E-11; // m
// Bohr radius (alias)
const double a0 = BOHR_RADIUS;
// the following values from:
// P.W.Atkins: Physical Chemistry, 5th ed., Oxford University Press, 1995
// Vacuum permittivity.
const double VACUUM_PERMITTIVITY = 8.85419E-12; // C^2 / (J * m)
// Vacuum permeability.
const double VACUUM_PERMEABILITY = (4 * PI * 1E-7); // J s^2 / (C^2 * m)
// Speed of light.
const double SPEED_OF_LIGHT = 2.99792458E+8; // m / s
// Speed of Light (alias)
const double c = SPEED_OF_LIGHT;
// Gravitational constant.
const double GRAVITATIONAL_CONSTANT = 6.67259E-11; // N m^2 / kg^2
// Fine structure constant.
const double FINE_STRUCTURE_CONSTANT = 7.29735E-3; // 1
// Degree per rad.
const double DEG_PER_RAD = 57.2957795130823209;
// Rad per degree.
const double RAD_PER_DEG = 0.0174532925199432957;
// mm per inch.
const double MM_PER_INCH = 25.4;
// m per foot.
const double M_PER_FOOT = 3.048;
// Joule per calorie
const double JOULE_PER_CAL = 4.184;
// Calories per Joule.
const double CAL_PER_JOULE = (1 / 4.184);
}
}
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