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CODATA recommended values of fundamental atomic and nuclear constants CODATA 2006 values as of 2007/03/30
namespace boost { namespace units { namespace si { namespace constants { namespace codata { BOOST_UNITS_PHYSICAL_CONSTANT(m_tau, quantity< mass >, 3.16777e-27 *, 5.2e-31 *); // tau-electron mass ratio BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_e, quantity< dimensionless >, 3477.48 * dimensionless, 5.7e-1 * dimensionless); // tau-muon mass ratio BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_mu, quantity< dimensionless >, 16.8183 * dimensionless, 2.7e-3 * dimensionless); // tau-proton mass ratio BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_p, quantity< dimensionless >, 1.89390 * dimensionless, 3.1e-4 * dimensionless); // tau-neutron mass ratio BOOST_UNITS_PHYSICAL_CONSTANT(m_tau_over_m_n, quantity< dimensionless >, 1.89129 * dimensionless, 3.1e-4 * dimensionless); // tau molar mass BOOST_UNITS_PHYSICAL_CONSTANT(M_tau, quantity< mass_over_amount >, 1.90768e-3 *kilograms/ mole, 3.1e-7 *kilograms/ mole); // tau Compton wavelength BOOST_UNITS_PHYSICAL_CONSTANT(lambda_C_tau, quantity< length >, 0.69772e-15 * meters, 1.1e-19 * meters); } } } } }