Speaker
Christoph Wiesinger
(TU München)
Description
In-situ production of long-lived isotopes by cosmic muon interactions may generate a non-negligible background for deep underground rare event searches.
Previous Monte Carlo studies for the GERDA experiment at LNGS identified the delayed decays of $^{77}$Ge and its metastable state $^{77m}$Ge as dominant cosmogenic background contribution in the search for neutrinoless double beta decay of $^{76}$Ge.
It might define a minimum depth requirement for next generation experiments aiming for an increased $^{76}$Ge mass at background-free conditions.
In this re-evaluation it is shown that the application of state-of-the-art active background suppression techniques and simple delayed coincidence cuts allow to reduce the $^{77(m)}$Ge background by more than one order of magnitude.
This virtual depth increase by active background rejection opens the way for next generation rare event searches at LNGS.
| Session and Location | Monday Session, Poster Wall #40 (Auditorium Gallery Right) |
|---|---|
| Poster included in proceedings: | yes |
Primary author
Christoph Wiesinger
(TU München)
Co-authors
Luciano Pandola
(INFN Laboratori Nazionali del Sud)
Schönert Stefan
(TU München)
