Cobalt-60
钴-60
The cobalt-60 isotope undergoes beta decay with a half-life of 5.272 years.
钴-60同位素发生β衰变，半衰期为5.272年。
Cobalt-60 decays to Nickel-60 plus an electron and an electron antineutrino. The decay is initially to a nuclear excited state of Nickel-60 from which it emits either one or two gamma ray photons to reach the ground state of the Nickel isotope.
钴-60衰变成镍-60，同时释放出一个电子和一个电子中微子。这种衰变最初使镍-60处于激发态，随后发射一个或两个伽马射线光子，以达到镍同位素的基态。
This particular radioisotope is historically important for several reasons. It is involved in the radioactive fallout from nuclear weapons. For many years, the gamma radiation from this decay was the main source for radiation therapy for cancer. This decay was used in the famous experiment by C. S. Wu in which she demonstrated the nonconservation of parity .
这种特定的放射性同位素因以下几个原因具有历史意义。它参与了核武器爆炸产生的放射性沉降。多年来，这种衰变产生的伽马射线是癌症放疗的主要辐射源。这种衰变曾被用于C. S. Wu著名的实验中，她在该实验中证明了宇称的不守恒。
索引
| HyperPhysics***** Nuclear
HyperPhysics ***** 核物理 | R Nave |
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