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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_alpha, quantity< mass >, 6.64465620e-27 *, 3.3e-34 *); // alpha-electron mass ratio BOOST_UNITS_PHYSICAL_CONSTANT(m_alpha_over_m_e, quantity< dimensionless >, 7294.2995365 * dimensionless, 3.1e-6 * dimensionless); // alpha-proton mass ratio BOOST_UNITS_PHYSICAL_CONSTANT(m_alpha_over_m_p, quantity< dimensionless >, 3.97259968951 * dimensionless, 4.1e-10 * dimensionless); // alpha molar mass BOOST_UNITS_PHYSICAL_CONSTANT(M_alpha, quantity< mass_over_amount >, 4.001506179127e-3 *kilograms/ mole, 6.2e-14 *kilograms/ mole); } } } } }