What type of decay happened if a cobalt atom turned into a nickel atom?
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As cobalt-60 decays into a stable nickel-60 isotope, two wavelengths of high-energy gamma-rays are emitted (1.17 and 1.33 MeV- average of 1.25 MeV used). Large sources of cobalt-60 are used in the sterilisation of spices and certain foods by a process often referred to as 'cold pasteurisation'.
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The cobalt-60 isotope undergoes beta decay with a half-life of 5.272 years. 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. This particular radioisotope is historically important for several reasons.
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