Pulse Shape Discrimination in the IGEX Experiment
D. Gonzalez, J. Morales, S. Cebrian, E. Garcia, I.G. Irastorza, A., Morales, A. Ortiz de Solorzano, J. Puimedon, M.L. Sarsa, J.A. Villar, C.E., Aalseth, F.T. Avignone III, R.L. Brodzinski, W.K. Hensley, H.S. Miley, J.H., Reeves, I.V. Kirpichnikov, A.A. Klimenko, S.B. Osetrov
TL;DR
This paper discusses the implementation of pulse shape discrimination techniques in the IGEX experiment, significantly reducing background noise in the search for neutrinoless double beta decay of 76Ge.
Contribution
It provides a detailed description of pulse shape discrimination methods and demonstrates their effectiveness in background reduction for germanium detector data.
Findings
Approximately 60% background rejection achieved.
Background level reduced to about 0.09 c/(keV kg y).
Analysis applied to a subset of IGEX data.
Abstract
The IGEX experiment has been operating enriched germanium detectors in the Canfranc Underground Laboratory (Spain) in a search for the neutrinoless double decay of 76Ge. The implementation of Pulse Shape Discrimination techniques to reduce the radioactive background is described in detail. This analysis has been applied to a fraction of the IGEX data, leading to a rejection of ~60 % of their background, in the region of interest (from 2 to 2.5 MeV), down to ~0.09 c/(keV kg y).
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