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CODATA recommended values of fundamental electromagnetic constants.
CODATA recommended values of the fundamental physical constants: NIST SP 961 CODATA 2006 values as of 2007/03/30
namespace boost { namespace units { namespace si { namespace constants { namespace codata { // elementary charge BOOST_UNITS_PHYSICAL_CONSTANT(e, quantity< electric_charge >, 1.602176487e-19 * coulombs, 4.0e-27 * coulombs); // elementary charge to Planck constant ratio BOOST_UNITS_PHYSICAL_CONSTANT(e_over_h, quantity< current_over_energy >, 2.417989454e14 *amperes/ joule, 6.0e6 *amperes/ joule); // magnetic flux quantum BOOST_UNITS_PHYSICAL_CONSTANT(Phi_0, quantity< magnetic_flux >, 2.067833667e-15 * webers, 5.2e-23 * webers); // conductance quantum BOOST_UNITS_PHYSICAL_CONSTANT(G_0, quantity< conductance >, 7.7480917004e-5 * siemens, 5.3e-14 * siemens); // Josephson constant. BOOST_UNITS_PHYSICAL_CONSTANT(K_J, quantity< frequency_over_electric_potential >, 483597.891e9 *hertz/ volt, 1.2e7 *hertz/ volt); // von Klitzing constant BOOST_UNITS_PHYSICAL_CONSTANT(R_K, quantity< resistance >, 25812.807557 * ohms, 1.77e-5 * ohms); // Bohr magneton. BOOST_UNITS_PHYSICAL_CONSTANT(mu_B, quantity< energy_over_magnetic_flux_density >, 927.400915e-26 *joules/ tesla, 2.3e-31 *joules/ tesla); // nuclear magneton BOOST_UNITS_PHYSICAL_CONSTANT(mu_N, quantity< energy_over_magnetic_flux_density >, 5.05078324e-27 *joules/ tesla, 1.3e-34 *joules/ tesla); } } } } }