Signatures of muonic activation in the Majorana Demonstrator

Signatures of muonic activation in the Majorana Demonstrator
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马约拉纳演示器中μ子激活的特征

DOI:
10.1103/physrevc.105.014617
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发表时间:
2022
期刊:
影响因子:
3.1
通讯作者:
Caldwell, T. S.
Caldwell, T. S.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Arnquist, I. J.;Avignone, F. T.;Barabash, A. S.;Barton, C. J.;Bertrand, F. E.;Blalock, E.;Bos, B.;Busch, M.;Buuck, M.;Caldwell, T. S.

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Experiments searching for very rare processes such as neutrinoless double-beta decay require a detailed understanding of all sources of background. Signals from radioactive impurities present in construction and detector materials can be suppressed using a number of well-understood techniques. Background fromin situcosmogenic interactions can be reduced by siting an experiment deep underground. However, the next generation of such experiments have unprecedented sensitivity goals ofyears half-life with background rates ofin the region of interest. To achieve these goals, the remaining cosmogenic background must be well understood. In the work presented here,Majorana Demonstratordata are used to search for decay signatures of metastable germanium isotopes. Contributions to the region of interest in energy and time are estimated using simulations and compared to Demonstrator data. Correlated time-delayed signals are used to identify decay signatures of isotopes produced in the germanium detectors. A good agreement between expected and measured rate is found and different simulation frameworks are used to estimate the uncertainties of the predictions. The simulation campaign is then extended to characterize the background for the LEGEND experiment, a proposed tonne-scale effort searching for neutrinoless double-beta decay in.
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