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