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Phys Rev Lett. 2012 Feb 10;108(6):062501. Epub 2012 Feb 9.

First measurement of the partial widths of 209Bi decay to the ground and to the first excited states.

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Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.

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  • Phys Rev Lett. 2012 Mar 30;108(13):139903.


209Bi alpha decay to the ground and to the first excited state have been recently observed for the first time with a large BGO scintillating bolometer. The half-life of 209Bi is determined to be τ(1/2)=(2.01±0.08)×10(19) yr while the branching ratio for the ground-state to ground-state transition is (98.8±0.3)%.

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