Event Classification in Liquid Scintillator Using PMT Hit Patterns by Jack Dunger

Author:Jack Dunger
Language: eng
Format: epub
ISBN: 9783030316167
Publisher: Springer International Publishing

Another major background comes from ordinary 2 decays: finite energy resolution pushes events from the steeply falling 2 tail into the signal window. 0 and 2 differ from one another only in the amount of visible energy released, so this background cannot be reduced without improved energy resolution.

The half-life of the decay is already well constrained by CUORE-0 to be yr [6] and it is likely that the CUORE experiment will publish an improved measurement on the half-live and energy spectrum in time for use in SNO+ analysis [6]. This half-life translates to one 2 event every 6s in SNO+ phase I. The CUORE measurements could be used as a constraint on the 0 rate, provided the number of Te nuclei in the target can be accurately determined.

In addition, the 2 background should dominate the events collected in the region 1.5–2.5 MeV. There, its steeply falling energy spectrum will be powerful for extracting the 2 normalisation, provided energy response uncertainties can be kept under control [4].

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