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Journal Article

Liquid argon light collection and veto modeling in GERDA Phase II

MPS-Authors

Agostini,  M.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Alexander,  A.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Araujo,  G.R.
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

et al., 
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

Agostini, M., Alexander, A., Araujo, G., & et al. (2023). Liquid argon light collection and veto modeling in GERDA Phase II. European Physical Journal C, 83. doi:10.1140/epjc/s10052-023-11354-9.


Cite as: https://hdl.handle.net/21.11116/0000-000F-1108-5
Abstract
The ability to detect liquid argon scintillation light from within a densely packed high-purity germanium detector array allowed the Gerda experiment to reach an exceptionally low background rate in the search for neutrinoless double beta decay of {\$}{\$}{\{}{\}}^{\{}76{\}}{\$}{\$}Ge. Proper modeling of the light propagation throughout the experimental setup, from any origin in the liquid argon volume to its eventual detection by the novel light read-out system, provides insight into the rejection capability and is a necessary ingredient to obtain robust background predictions. In this paper, we present a model of the Gerda liquid argon veto, as obtained by Monte Carlo simulations and constrained by calibration data, and highlight its application for background decomposition.