SEARCH Articles Figures Tables Electron spin Hund’s rule and First-Order Spin-Orbit Coupling Selection Rules Magnetic field effects spin selection rule Polarized scattering sum rule and the spin crisis Quasi-Spin Selection Rules Quasi-Spin and Pseudo-Cylindrical Selection Rules Rule of maximum spin Rules spin selection rule Selection rules spin-multiplicity Spin conservation rule Spin rule and Spin-selection rule Wigner spin-conservation rule Wigner’s spin conservation rule Wigner’s spin rule