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Nagorny","submitted_at":"2013-11-12T16:41:35Z","abstract_excerpt":"We report on the first compelling observation of $\\alpha$ decay of $^{151}$Eu to the ground state of $^{147}$Pm. The measurement was performed using a 6.15 g Li$_6$Eu(BO$_3$)$_3$ crystal operated as a scintillating bolometer. The Q-value and half-life measured are: Q = 1948.9$\\pm 6.9(stat.) \\pm 5.1(syst.)$ keV, and T$_{1/2}=\\left( 4.62\\pm0.95(stat.)\\pm0.68(syst.)\\right) \\times 10^{18}$ y . 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