Isotopic signatures and neutron simulations for LEGEND using Geant4 and MCNP
ORAL
Abstract
The ton-scale LEGEND project will search for neutrinoless double-beta decay in 76Ge. The first phase of the project, LEGEND-200, is in commissioning at the Laboratori Nazionali del Gran Sasso. To assess the suitability of the candidate host sites for the final LEGEND-1000 phase of the project, an estimate of the background induced by muons is necessary. Simulations of these backgrounds, particularly those via muon-induced neutrons, come with large uncertainties. Benchmarking simulations using Geant4 and MCNP are being executed and analyzed to assess systematic uncertainties. A search for key radioactive isotopes produced by neutron captures will be performed in LEGEND-200, which can be used to estimate the in-situ cosmogenic background in LEGEND phases. This talk discusses the MCNP-Geant4 comparisons, identifies isotopic signatures which might be visible in LEGEND-200, and uses simulations to estimate the rate for these signatures.
*This work is supported by the U.S. DOE and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak SRDA; the Swiss SNF; the UK STFC; the Russian RFBR; the Canadian NSERC and CFI; the LNGS, SNOLAB, and SURF facilities.
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Presenters
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Clay D Barton
- University of South Dakota