Measurement of 216Po half-life with the CUPID-0 experiment

Rare event physics demands very detailed background control, high-performance detectors, and custom analysis strategies. Cryogenic calorimeters combine all these ingredients very effectively, representing a promising tool for next-generation experiments. CUPID-0 is one of the most advanced examples of such a technique, having demonstrated its potential with several results obtained with limited exposure. In this paper, we present a further application. Exploiting the analysis of delayed coincidence, we can identify the signals caused by the Rn-220-Po-216 decay sequence on an event-by-event basis. The analysis of these events allows us to extract the time differences between the two decays, leading to a new evaluation of Po-216 half-life, estimated as (143.3 +/- 2.8) ms. (C) 2021 The Author(s). Published by Elsevier B.V.

Automated summary

Rare event physics requires detailed background control, high-performance detectors, and custom analysis strategies. Cryogenic calorimeters are effective tools for next-generation experiments, with CUPID-0 being a promising example. By analyzing delayed coincidence, researchers were able to extract time differences between decays and evaluate the Po-216 half-life.