First measurement of the partial widths of ${}^{209}$Bi decay to the ground and to the first excited states

Abstract

${}^{209}$Bi alpha decay to the ground and to the first excited state have been contemporary observed for the first time with a large BGO scintillating bolometer. The half-life of ${}^{209}$Bi is determined to be ${\tau }_{1/2}$=(2.01$\pm$0.08)$\cdot 10^{19}$ years while the branching ratio for the ground-state to ground-state transition is (98.8$\pm$0.3)%.

5 pages, 4 figures

References in corpus (2)

• CdWO4 scintillating bolometer for Double Beta Decay: Light and Heat anticorrelation, light yield and quenching factors
• Characterization of ZnSe scintillating bolometers for Double Beta Decay

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