Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 121: Search for Dark Matter 6

T 121.2: Vortrag

Freitag, 8. März 2024, 09:15–09:30, Geb. 30.35: HSI

Nuclear recoil response calibration for the XENONnT experiment — •Johanna Jakob for the XENON collaboration — Institut für Kernphysik, Universität Münster, Germany

XENONnT is currently taking science data with the science goals to detect weakly interacting massive particles (WIMPs) and other rare event signals. The detector is a dual-phase time projection chamber filled with 8.5 tons of liquid xenon surrounded by an active water Cherenkov neutron and muon veto. Just like WIMPs, neutrons scatter off xenon nuclei elastically, producing a nuclear recoil (NR), and tend to leave the TPC cryostat after a single backscatter. As these signals are indistinguishable from WIMPs, they provide an excellent calibration source. This talk discusses a background-free NR response calibration of the XENONnT TPC, using neutrons from an americium beryllium source which are tagged by coincidentally emitted γs detected in the neutron veto. This work is supported by BMBF under contract 05A23PM1 und by DFG within the Research Training Group GRK-2149.

Keywords: XENONnT; Nuclear recoil