Boost C++ Libraries Home Libraries People FAQ More

PrevUpHomeNext

Header <boost/units/systems/si/codata/tau_constants.hpp>

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);
        }
      }
    }
  }
}

PrevUpHomeNext