Cosmogenic Activation of Germanium Used for Tonne-Scale Rare Event Search Experiments
arXiv:1706.05324 · doi:10.1016/j.astropartphys.2017.10.007
Abstract
We report a comprehensive study of cosmogenic activation of germanium used for tonne-scale rare event search experiments. The germanium exposure to cosmic rays on the Earth's surface are simulated with and without a shielding container using Geant4 for a given cosmic muon, neutron, and proton energy spectrum. The production rates of various radioactive isotopes are obtained for different sources separately. We find that fast neutron induced interactions dominate the production rate of cosmogenic activation. Geant4-based simulation results are compared with the calculation of ACTIVIA and the available experimental data. A reasonable agreement between Geant4 simulations and several experimental data sets is presented. We predict that cosmogenic activation of germanium can set limits to the sensitivity of the next generation of tonne-scale experiments.
arXiv comment20 pages, 5 figures, and 12 tables
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Cited by in corpus (12)
- Cosmogenic activation of materials
- Fabrication and Characterization of High-Purity Germanium Detectors with Amorphous Germanium Contacts
- Large-size sub-keV sensitive germanium detectors for the CONUS experiment
- Impact of Charge Trapping on the Energy Resolution of Ge Detectors for Rare-Event Physics Searches
- Study on cosmogenic activation in germanium detectors for future tonne-scale CDEX experiment
- Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite
- Full background decomposition of the CONUS experiment
- Cosmogenic activation in double beta decay experiments
- Virtual depth by active background suppression: Revisiting the cosmic muon induced background of GERDA Phase II
- Signatures of muonic activation in the Majorana Demonstrator
- Cosmogenic background study for a 100Mo-based bolometric demonstration experiment at China JinPing underground Laboratory
- Study on cosmogenic activation in copper for rare event search experiments