Low Radioactivity Techniques (LRT2022)

Mitigation of Cosmogenically Induced Background from 42Ar/42K using Encapsulation with Ultra-Pure Plastic for the LEGEND Experiment

Jun 15, 2022, 3:21 PM

1m

Surbeck Ballroom (South Dakota Mines)

Poster Experiment Backgrounds, Models, Simulations LRT 2022 - poster session

Speaker

Ibrahim Mirza (University of Tennessee)

Description

Neutrinoless double beta (0$\nu \beta \beta$) decay is a most compelling approach to determine the Majorana nature of neutrino and measure absolute value of neutrino mass. The LEGEND collaboration is aiming to look for a rare nuclear decay, ${}^{76}$Ge $\to$ ${}^{76}$Se + e${}^{-}$ + e${}^{-}$. Cosmologically induced isotope ${}^{42}$Ar and its decay progeny ${}^{42}$K in a liquid argon could create irreducible background for the 0$\nu \beta \beta$ signal. We are studying the methodologies to mitigate the ${}^{42}$K background. In order to do this, encapsulation to germanium detectors with 3D printing technologies using low background material are currently under investigation. Simulation results of Poly Ethylene Naphthalate (PEN) encapsulation to germanium detectors and plans to study other perspective materials are presented.

Presentation materials

Poster_42Ar_LEGEND.pdf

Peer reviewing

Paper

Accepted on Nov 30, 2022 by Richard Schnee

Mirza_Nov30.pdf