/*   []----------------------------------------[]
      |             Constants.h                |
     []----------------------------------------[]
      |                                        |
      |   AUTHOR:    MFSomers 2005.            |
      |   USE:       Some elementry constants  |
      |              often used ...            |
      |                                        |
     []----------------------------------------[]
*/

// Copyright (C) 2005 M.F. Somers, Theoretical Chemistry Department, Leiden University
//
// This is free software; you can redistribute it and/or modify it under the terms of
// the GNU Lesser General Public License as published by the Free Software Foundation.
//
// http://www.gnu.org/licenses/lgpl.txt

#if !defined(__CONSTANTS_INCLUDED__)

#define __CONSTANTS_INCLUDED__

/* ---------------------------------------------------------------------------- */
/* all constants are defined in SI */

#define CONST_PI                    3.141592653589793E+000
#define CONST_HUGE_VALUE            1.000000000000000E+300
#define CONST_EPSILON               1.000000000000000E-012

#define CONST_SPEED_OF_LIGHT        2.997924580000000E+008        /* m/s */
#define CONST_ELEM_CHARGE           1.602176000000000E-019        /* C */  
#define CONST_PLANCK                6.626068800000000E-034        /* J*s */
#define CONST_BOLTZMANN             1.380650000000000E-023        /* J/K  */
#define CONST_AVOGADRO              6.022140000000000E+023        /* 1/mol */
#define CONST_RYDBERG               1.097373157000000E+005        /* 1/cm */
#define CONST_HARTREE               4.359743800000000E-018        /* J */
#define CONST_ELECTRONVOLT          1.602176486215346E-019        /* J */
#define CONST_MASS_ELECTRON         9.109380000000000E-031        /* kg */
#define CONST_MASS_PROTON           1.672620000000000E-027        /* kg */
#define CONST_MASS_NEUTRON          1.674930000000000E-027        /* kg */
#define CONST_ATOMIC_MASS           1.660540000000000E-027        /* kg */
#define CONST_VACUUM_PERMITTIVITY   8.854187817000000E-012        /* C^2/(J*m) */
#define CONST_BOHR_MAGNETON         9.274009000000000E-024        /* J/T */
#define CONST_NUCLEAR_MAGNETON      5.050783200000000E-027        /* J/T */
#define CONST_G_ELECTRON            2.002319304000000E+000
#define CONST_BOHR_RADIUS           5.291772080000000E-011        /* m */
#define CONST_HYPERFINE_STRUCT      7.297352530000000E-003
#define CONST_GRAVITATIONAL_CONST   6.673000000000000E-011        /* m^3/(kg*s^2) */

/* ---------------------------------------------------------------------------- */

#endif