UCLA Dark Matter 2018

Xinran Li (Princeton): Study on CMOS imaging detector for the search of neutrinoless double β decay in 82Se

21 Feb 2018, 18:30

30m

Poster Poster Session

Speaker

Xinran Li (Princeton University)

Description

The observation of a neutrinoless double $\beta$ decay branching ratio is the only known test if neutrinos are Majorana fermions. While one of the isotope, ${}^{82}\mathrm{Se}$, being a double $\beta$ decay candidate, amorphous selenium have been used as X-ray detector for medical imaging for decades. In this work, a high-resolution solid state a-Se imaging detector based on CMOS technology is proposed, which presents great background rejection power and the feasibility to build large scale detector. Currently, experiments are being carried out to demonstrate that a-Se detector could reach the proposed performance, especially the average electron-hole pair production energy and the Fano factor from MeV $\beta$ ionization under large biasing field.