39.3 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.