; file: constants_si.idl = assign values of constants in S units ; init: Jan 14 2012 ; note: derived from Uitenbroek RH file constants.h ; corrected ; --- Mathematical constants PI = 3.14159265358979 SQRTPI = 1.77245385090551 TWOSQRTTWO = 0.35355339059327 ; 1/(2sqrt(2)) ; --- Unit conversions AA_TO_M = 1.0E-10 NM_TO_M = 1.0E-09 CM_TO_M = 1.0E-02 KM_TO_M = 1.0E+03 ERG_TO_JOULE = 1.0E-07 G_TO_KG = 1.0E-03 MICRON_TO_NM = 1.0E+03 MEGABARN_TO_M2 = 1.0E-22 ATM_TO_PA = 1.0135E+05 ; Atm to Pascal (N/m^2) ; --- Physics constants in SI (m, Joule, etc) CLIGHT = 2.99792458E+08 ; Speed of light [m/s] HPLANCK = 6.626068E-34 ; Planck's constant [Js] KBOLTZMANN = 1.380650E-23 ; Boltzman's constant [J/K] AMU = 1.6605402E-27 ; Atomic mass unit [kg] M_ELECTRON = 9.1093897E-31 ; Electron mass [kg] Q_ELECTRON = 1.60217733E-19 ; Electron charge [C] EPSILON_0 = 8.854187817E-12 ; Vacuum permittivity [F/m] MU_0 = 1.2566370614E-06 ; Magnetic induct. of vac. RBOHR = 5.29177349E-11 ; Bohr radius [m] E_RYDBERG = 2.1798741E-18 ; Ion. pot. Hydrogen [J] EV = 1.60217733E-19 ; One electronVolt [J] THETA0 = 5.03974756E+03 ; log10(e) * eV/k [K^-1] ABARH = 7.42E-41 ; polarizabilty of Hydrogen in [Fm^2] LARMOR = (Q_ELECTRON/(4.0*PI*M_ELECTRON))*NM_TO_M ; Larmor radius E_ION_HMIN = 0.754 * EV ; Ionization energy Hmin in [J]