Descrição
The XENONnT direct dark matter detection experiment searches not only for dark matter but also for other rare events, such as solar pp neutrino signals. Accurate background event rate estimation is essential for these searches. One of the background sources in the low-energy region is the radioactive isotope 85Kr, present in the target material, liquid xenon. To precisely determine its abundance, delayed coincidence counting for 85Kr has been introduced. This poster shows the details of this method, performance, and results.
Autor
Yoshino Kaminaga
(The University of Tokyo)