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- Title
Improving radioactive contaminant identification through the analysis of delayed coincidences with an α-spectrometer.
- Authors
Baccolo, G.; Barresi, A.; Beretta, M.; Chiesa, D.; Nastasi, M.; Pagnanini, L.; Pozzi, S.; Previtali, E.; Sisti, M.; Terragni, G.
- Abstract
In the framework of rare event searches, the identification of radioactive contaminants in ultra-pure samples is a challenging task, because the signal is often at the same level of the instrumental background. This is a rather common situation for α -spectrometers and other detectors used for low-activity measurements. In order to obtain the target sensitivity without extending the data taking live-time, analysis strategies that highlight the presence of the signal sought should be developed. In this paper, we show how to improve the contaminant tagging capability relying on the time-correlation of radioactive decay sequences. We validate the proposed technique by measuring the impurity level of both contaminated and ultra-pure copper samples, demonstrating the potential of this analysis tool in disentangling different background sources and providing an effective way to mitigate their impact in rare event searches.
- Subjects
RADIOACTIVE decay; COINCIDENCE; POLLUTANTS; GERMANIUM radiation detectors
- Publication
European Physical Journal C -- Particles & Fields, 2021, Vol 81, Issue 11, p1
- ISSN
1434-6044
- Publication type
Article
- DOI
10.1140/epjc/s10052-021-09759-5