New experimental limits on the α decays of lead isotopes

  title={New experimental limits on the $\alpha$ decays of lead isotopes},
  author={Jeffrey W. Beeman and F. Bellini and Laura Cardani and Nicola Casali and S. Di Domizio and Ettore Fiorini and Luca Gironi and Serge Nagorny and Stefano Nisi and Filippo Orio and Luca Pattavina and Gianluigi Pessina and Gabriele Piperno and Stefano Pirr{\`o} and Ezio Previtali and Claudia Rusconi and C. Tomei and Marco Vignati},
  journal={The European Physical Journal A},
Abstract.For the first time ancient Roman lead was used to grow a crystal of PbWO4 , and this crystal has subsequently been used as a cryogenic particle detector. The new device provides independent readout of heat and scintillation light and is able to discriminate between $ \beta/\gamma$ interactions and alpha interactions down to few keV. Stringent limits on the $ \alpha$ decays of the lead isotopes are presented. In particular a limit of $ T_{1/2}>1.4\cdot 10^{20}$ y at a 90% C.L. was… 
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