Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases
Abstract The analysis of the time profile of electrical signals produced by energy depositions in germanium detectors allows discrimination of events with different topologies. This is especially relevant for experiments searching for the neutrinoless double beta decay of $$^{76}$$ 76 Ge to distingu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2023-03-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-023-11396-z |
| _version_ | 1797836276824539136 |
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| author | Tommaso Comellato Matteo Agostini Stefan Schönert |
| author_facet | Tommaso Comellato Matteo Agostini Stefan Schönert |
| author_sort | Tommaso Comellato |
| collection | DOAJ |
| description | Abstract The analysis of the time profile of electrical signals produced by energy depositions in germanium detectors allows discrimination of events with different topologies. This is especially relevant for experiments searching for the neutrinoless double beta decay of $$^{76}$$ 76 Ge to distinguish the sought-after signal from other background sources. The standard calibration procedures used to tune the selection criteria for double-beta decay events use a $$^{228}$$ 228 Th source, because it provides samples of signal-like events. These samples exhibit energy spatial distributions with subtle different topologies compared to neutrinoless double-beta decay events. In this work, we will characterize these topological differences and, with the support of a $$^{56}$$ 56 Co source, evaluate biases and precision of calibration techniques which use such event samples. Our results will be particularly relevant for future experiments in which a solid estimation of the efficiency is required. |
| first_indexed | 2024-04-09T15:07:20Z |
| format | Article |
| id | doaj.art-567f24244a1142ce8d8e1e406bd9b3f8 |
| institution | Directory Open Access Journal |
| issn | 1434-6052 |
| language | English |
| last_indexed | 2024-04-09T15:07:20Z |
| publishDate | 2023-03-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-567f24244a1142ce8d8e1e406bd9b3f82023-04-30T11:25:52ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60522023-03-018331910.1140/epjc/s10052-023-11396-zTopologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biasesTommaso Comellato0Matteo Agostini1Stefan Schönert2Physik Department E15, Technische Universität MünchenPhysik Department E15, Technische Universität MünchenPhysik Department E15, Technische Universität MünchenAbstract The analysis of the time profile of electrical signals produced by energy depositions in germanium detectors allows discrimination of events with different topologies. This is especially relevant for experiments searching for the neutrinoless double beta decay of $$^{76}$$ 76 Ge to distinguish the sought-after signal from other background sources. The standard calibration procedures used to tune the selection criteria for double-beta decay events use a $$^{228}$$ 228 Th source, because it provides samples of signal-like events. These samples exhibit energy spatial distributions with subtle different topologies compared to neutrinoless double-beta decay events. In this work, we will characterize these topological differences and, with the support of a $$^{56}$$ 56 Co source, evaluate biases and precision of calibration techniques which use such event samples. Our results will be particularly relevant for future experiments in which a solid estimation of the efficiency is required.https://doi.org/10.1140/epjc/s10052-023-11396-z |
| spellingShingle | Tommaso Comellato Matteo Agostini Stefan Schönert Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases European Physical Journal C: Particles and Fields |
| title | Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases |
| title_full | Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases |
| title_fullStr | Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases |
| title_full_unstemmed | Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases |
| title_short | Topologies of $$^{76}$$ 76 Ge double-beta decay events and calibration procedure biases |
| title_sort | topologies of 76 76 ge double beta decay events and calibration procedure biases |
| url | https://doi.org/10.1140/epjc/s10052-023-11396-z |
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