![]() The kinetic energy of the emitted neutrino is given approximately by Q minus the. Beta plus decay is a process in which a nucleus emits a positron. Protons are fermions and have equal numbers of left-handed and right-handed components, and are therefore chirally symmetric. ![]() In studying the gamma decay we calculated the density of states, as required by the Fermi’s Golden Rule. is the momentum, and Q is the Q value of the decay. Beta plus decay can only happen inside nuclei when the absolute value of the binding energy of the daughter nucleus is higher than that of the mother nucleus. Unlike other radioactive decay, it is not accompanied by the emission of a high energy neutrino or the emission of a neutron. \right)\) accounts for the Coulomb interaction between the nucleus and the electron that we had neglected in the previous expression (where we only considered the weak interaction). For beta decay, involving three particles, the beta electron energy is distributed from a low value up to the energy yield of the decay. This, then, is the golden signature of neutrinoless double beta decay: 136Ba plus two electrons whose energy adds up to exactly 2458 MeV, since there is no.
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