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40.3 Atomic and Nuclear Physics

GSL_CONST_MKSA_ELECTRON_CHARGE
The charge of the electron, e.
GSL_CONST_MKSA_ELECTRON_VOLT
The energy of 1 electron volt, eV.
GSL_CONST_MKSA_UNIFIED_ATOMIC_MASS
The unified atomic mass, amu.
GSL_CONST_MKSA_MASS_ELECTRON
The mass of the electron, m_e.
GSL_CONST_MKSA_MASS_MUON
The mass of the muon, m_\mu.
GSL_CONST_MKSA_MASS_PROTON
The mass of the proton, m_p.
GSL_CONST_MKSA_MASS_NEUTRON
The mass of the neutron, m_n.
GSL_CONST_NUM_FINE_STRUCTURE
The electromagnetic fine structure constant \alpha.
GSL_CONST_MKSA_RYDBERG
The Rydberg constant, Ry, in units of energy. This is related to the Rydberg inverse wavelength R_\infty by Ry = h c R_\infty.
GSL_CONST_MKSA_BOHR_RADIUS
The Bohr radius, a_0.
GSL_CONST_MKSA_ANGSTROM
The length of 1 angstrom.
GSL_CONST_MKSA_BARN
The area of 1 barn.
GSL_CONST_MKSA_BOHR_MAGNETON
The Bohr Magneton, \mu_B.
GSL_CONST_MKSA_NUCLEAR_MAGNETON
The Nuclear Magneton, \mu_N.
GSL_CONST_MKSA_ELECTRON_MAGNETIC_MOMENT
The absolute value of the magnetic moment of the electron, \mu_e. The physical magnetic moment of the electron is negative.
GSL_CONST_MKSA_PROTON_MAGNETIC_MOMENT
The magnetic moment of the proton, \mu_p.
GSL_CONST_MKSA_THOMSON_CROSS_SECTION
The Thomson cross section, \sigma_T.
GSL_CONST_MKSA_DEBYE
The electric dipole moment of 1 Debye, D.