Measurement Of Po-216 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.