Detecting multi-hit events in a CdZnTe coplanar grid detector using pulse shape analysis: A method for improving background rejection in the COBRA 0 nu beta beta experiment

作者：McGrath J^*; Fulton B R; Joshi P; Davies P; Muenstermann D; Schulz O; Zuber K; Freer M

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2010, 615(1): 57-61.

DOI：10.1016/j.nima.2010.01.025

• Neutrinoless double beta-decay
• Coplanar CdZnTe
• COBRA
• Background reduction

A number of experiments are underway to search for a rare form of radioactivity, neutrinoless double beta decay, as a measurement of the half-life would enable the neutrino mass to be determined. The COBRA collaboration [1,2] (Zuber, 2001: Dawson, 2009) employs CdZnTe detectors in such a search. This paper describes techniques using pulse shape analysis for identifying two-centre events in a coplanar grid CdZnTe detector. This enables Compton scatter events to be identified and so suppressing the background present within the COBRA detectors.

• 出版日期2010-3-21