Carbon-14 decays into nitrogen-14 through beta decay. Thorium-233 decays into protactinium-233 through beta decay. Th is an isotope of thorium that decays into protactinium-233 through beta decay. It decays into neptunium-237 by beta decay. Potassium-40 is a radioactive isotope of potassium that decays into argon-40. Uranium decays slowly by emitting an alpha particle. Similarly, a neutral pion most often decays into two photons. A large number of CP violation processes in B meson decays have now been discovered. After diffusing into these voids, it decays to caesium isotopes. When such an electron decays without external influence, it emits a photon. In 2013 LHCb announced discovery of CP violation in strange B meson decays. SK has set limits on proton lifetime and other rare decays and neutrino properties. An antineutrino is emitted, as in all negative beta decays. Efforts to design an accelerator facility where neutrinos are produced through muon decays are ongoing. Excess charge within an electret decays exponentially.