1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and 2 // unit/quantity manipulation and conversion 3 // 4 // Copyright (C) 2003-2008 Matthias Christian Schabel 5 // Copyright (C) 2008 Steven Watanabe 6 // 7 // Distributed under the Boost Software License, Version 1.0. (See 8 // accompanying file LICENSE_1_0.txt or copy at 9 // http://www.boost.org/LICENSE_1_0.txt) 10 11 #ifndef BOOST_UNITS_CODATA_ELECTROMAGNETIC_CONSTANTS_HPP 12 #define BOOST_UNITS_CODATA_ELECTROMAGNETIC_CONSTANTS_HPP 13 14 /// 15 /// \file 16 /// \brief CODATA recommended values of fundamental electromagnetic constants. 17 /// \details CODATA recommended values of the fundamental physical constants: NIST SP 961 18 /// CODATA 2006 values as of 2007/03/30 19 /// 20 21 #include <boost/units/quantity.hpp> 22 #include <boost/units/static_constant.hpp> 23 24 #include <boost/units/systems/detail/constants.hpp> 25 #include <boost/units/systems/si/conductance.hpp> 26 #include <boost/units/systems/si/current.hpp> 27 #include <boost/units/systems/si/electric_charge.hpp> 28 #include <boost/units/systems/si/electric_potential.hpp> 29 #include <boost/units/systems/si/energy.hpp> 30 #include <boost/units/systems/si/frequency.hpp> 31 #include <boost/units/systems/si/magnetic_flux.hpp> 32 #include <boost/units/systems/si/magnetic_flux_density.hpp> 33 #include <boost/units/systems/si/resistance.hpp> 34 35 #include <boost/units/systems/si/codata/typedefs.hpp> 36 37 namespace boost { 38 39 namespace units { 40 41 namespace si { 42 43 namespace constants { 44 45 namespace codata { 46 47 // ELECTROMAGNETIC 48 /// elementary charge 49 BOOST_UNITS_PHYSICAL_CONSTANT(e,quantity<electric_charge>,1.602176487e-19*coulombs,4.0e-27*coulombs); 50 /// elementary charge to Planck constant ratio 51 BOOST_UNITS_PHYSICAL_CONSTANT(e_over_h,quantity<current_over_energy>,2.417989454e14*amperes/joule,6.0e6*amperes/joule); 52 /// magnetic flux quantum 53 BOOST_UNITS_PHYSICAL_CONSTANT(Phi_0,quantity<magnetic_flux>,2.067833667e-15*webers,5.2e-23*webers); 54 /// conductance quantum 55 BOOST_UNITS_PHYSICAL_CONSTANT(G_0,quantity<conductance>,7.7480917004e-5*siemens,5.3e-14*siemens); 56 /// Josephson constant 57 BOOST_UNITS_PHYSICAL_CONSTANT(K_J,quantity<frequency_over_electric_potential>,483597.891e9*hertz/volt,1.2e7*hertz/volt); 58 /// von Klitzing constant 59 BOOST_UNITS_PHYSICAL_CONSTANT(R_K,quantity<resistance>,25812.807557*ohms,1.77e-5*ohms); 60 /// Bohr magneton 61 BOOST_UNITS_PHYSICAL_CONSTANT(mu_B,quantity<energy_over_magnetic_flux_density>,927.400915e-26*joules/tesla,2.3e-31*joules/tesla); 62 /// nuclear magneton 63 BOOST_UNITS_PHYSICAL_CONSTANT(mu_N,quantity<energy_over_magnetic_flux_density>,5.05078324e-27*joules/tesla,1.3e-34*joules/tesla); 64 65 } // namespace codata 66 67 } // namespace constants 68 69 } // namespace si 70 71 } // namespace units 72 73 } // namespace boost 74 75 #endif // BOOST_UNITS_CODATA_ELECTROMAGNETIC_CONSTANTS_HPP 76