Speaker
Wenhan Dai
Description
Exploring hit positions of recorded events can help to understand and suppress backgrounds in rare event searches. We propose a pulse shape analysis method to discriminate single-site events (SSEs) in the inner and outer layer of a small contact P-type germanium detector (HPGe). Our method uses the rise time of the charge pulse ($T_{Q}$) and current pulse ($T_I$) for event discrimination. A Th-228 experiment is conducted to determine the boundaries between the two layers. Our method could be used to suppress surface background like electrons from Ar-42 decay in 0νββ experiments using germanium detectors immersed in liquid argon.
Primary authors
Wenhan Dai
Prof.
Hao Ma
(Tsinghua University)
