pub const ELEMENTARY_CHARGE: f64 = 1.602_176_634e-19; pub const FINE_STRUCTURE_CONSTANT: f64 = 7.297_352_564_3e-3;
pub const JOSEPHSON_CONSTANT: f64 = 483_597.848_4e9; pub const VON_KLITZING_CONSTANT: f64 = 25_812.807_45; pub const MAGNETIC_FLUX_QUANTUM: f64 = 2.067_833_848e-15;
pub const BOHR_MAGNETON: f64 = 9.274_010_065_7e-24; pub const NUCLEAR_MAGNETON: f64 = 5.050_783_739_3e-27; pub const ELECTRON_MAGNETIC_MOMENT: f64 = -9.284_764_691_7e-24; pub const PROTON_MAGNETIC_MOMENT: f64 = 1.410_606_795_45e-26; pub const NEUTRON_MAGNETIC_MOMENT: f64 = -9.662_365_3e-27; pub const MUON_MAGNETIC_MOMENT: f64 = -4.490_448_30e-26;
pub const ELECTRON_CHARGE_TO_MASS_QUOTIENT: f64 = -1.758_820_008_38e11;