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 β/γ interactions and alpha interactions down to few keV. Stringent limits on the α decays of the lead isotopes are presented. In particular a limit of T1/2 > 1.4 · 1020 y at a 90% C.L. was evaluated for the α decay of 204Pb to 200Hg. © Società Italiana di Fisica/Springer-Verlag 2013.
New experimental limits on the α decays of lead isotopes / Beeman, J. W.; Bellini, Fabio; Cardani, Laura; Casali, N.; Di Domizio, S.; Fiorini, E.; Gironi, L.; Nagorny, S. S.; Nisi, S.; Orio, Filippo; Pattavina, L.; Pessina, G.; Piperno, Gabriele; Pirro, S.; Previtali, E.; Rusconi, C.; Tomei, C.; Vignati, Marco. - In: THE EUROPEAN PHYSICAL JOURNAL. A, HADRONS AND NUCLEI. - ISSN 1434-6001. - 49:4(2013). [10.1140/epja/i2013-13050-7]
New experimental limits on the α decays of lead isotopes
BELLINI, Fabio;CARDANI, LAURA;N. Casali;ORIO, FILIPPO;PIPERNO, GABRIELE;VIGNATI, Marco
2013
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 β/γ interactions and alpha interactions down to few keV. Stringent limits on the α decays of the lead isotopes are presented. In particular a limit of T1/2 > 1.4 · 1020 y at a 90% C.L. was evaluated for the α decay of 204Pb to 200Hg. © Società Italiana di Fisica/Springer-Verlag 2013.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
