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Bi was confirmed in 2012 by an Italian team in Gran Sasso who reported years. They also reported an even longer partial half-life for alpha decay of Bi to the first excited state of Tl (at 204 keV), estimated at 1.66 years. Even though this value is shorter than the half-life of Te, both alpha decays of Bi hold the record of the thinnest natural line widths of any measurable physical excitation, estimated respectively at ?? ? and ?? ? in application of the uncertainty principle

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