Beta Decay

allowed transitions angle angular correlation angular distribution angular momentum annihilation antineutrino approximation asymmetry axis B₁ C.V.C. theory calculated capture rate charge conjugation circular polarization components correction Coulomb coupling constants cross section Decay scheme Dirac equation direction double ẞ decay effect electromagnetic electron emission emitted energy experiment experimental Fermi interaction forbidden transitions ft values Gamow-Teller interaction Hamiltonian helicity invariant involved isobaric spin lepton lepton conservation log ft longitudinal polarization Lorentz transformations mc² measured mesons neutrino neutron nonconservation nonrelativistic nuclear matrix nuclear matrix elements nuclear ẞ decay nucleon nucleus observed obtain orbital P₁ parameter parity particles pion positrons proton pseudoscalar radiation ratio rays recoil relativistic rest mass reversal rotation scalar scattering selection rules shape factor shell model shown in Fig space inversion spinors ẞ interaction ẞ spectrum theoretical vector interaction wave function weak interactions zero