Measurement of the 212Po, 214Po and 212Pb half-life time with Timepix3

AbstraktAbstract

The half-life times of the relatively short-lived α-decaying isotopes 212Po and 214Po were measured with a hybrid pixel detector of Timepix3 technology. Radon daughter products were collected at the backside of a 1mm thick silicon sensor so that subsequent decays inject the polonium isotopes of interest shallowly into the backside of the sensor. The detector's high spatial and time resolution allow for particle identification and application of the delayed coincidence technique with low systematic uncertainty even at high rates. We find t212Po = (295.02 ± 0.18stat ± 0.17syst) ns and t214Po = (163.64 ± 0:038stat ± 0.093syst) µs. Studying the decay of the accumulated radon daughter products after removing the detector from the 220Rn field, the half-life time of the α-decay of 212Pb was measured to be t212Pb = (10.620 ± 0.011stat ± 0.014syst) h.

The half-life times of the relatively short-lived α-decaying isotopes 212Po and 214Po were measured with a hybrid pixel detector of Timepix3 technology. Radon daughter products were collected at the backside of a 1mm thick silicon sensor so that subsequent decays inject the polonium isotopes of interest shallowly into the backside of the sensor. The detector's high spatial and time resolution allow for particle identification and application of the delayed coincidence technique with low systematic uncertainty even at high rates. We find t212Po = (295.02 ± 0.18stat ± 0.17syst) ns and t214Po = (163.64 ± 0:038stat ± 0.093syst) µs. Studying the decay of the accumulated radon daughter products after removing the detector from the 220Rn field, the half-life time of the α-decay of 212Pb was measured to be t212Pb = (10.620 ± 0.011stat ± 0.014syst) h.