The decays of 214Po into 210Pb and of 212Po into 208Pb tagged by the previous decays from 214Bi and 212Bi have been studied inserting quartz vials inside the Counting Test Facility (CTF) at the underground laboratory in Gran Sasso (LNGS). We find that the mean lifetime of 214Po is (236.00±0.42(stat)±0.15(syst)) μs and that of 212Po is (425.1±0.9(stat)±1.2(syst)) ns. Our results are compatible with previous measurements, have a much better signal to background ratio, and reduce the overall uncertainties.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Waste Management and Disposal
- Health, Toxicology and Mutagenesis
- Alfa-decay lifetime
- Bi-Po coincidence
- Natural radioactivity