Segment Geometry Optimization and Prototype Studies of a Multi-Coincidence GAGG Solar Neutrino Detector

TL;DR

This paper presents the development and testing of a segmented GAGG detector designed to identify multi-coincidence signals from solar neutrino interactions, with potential applications in space-based neutrino detection.

Contribution

It introduces a novel segmented GAGG detector design optimized for detecting multi-coincidence solar neutrino signatures and demonstrates prototype performance with promising energy and spatial resolution.

Findings

Achieved sub 7% energy resolution at 137Cs

Successfully detected spatially-separated 57Co double-pulse decays

Validated the detector's capability for multi-coincidence event detection

Abstract

A GAGG detector capable of dissecting a multi-coincidence solar neutrino interaction on ${}^{71}$Ga is under development for potential space-based applications. We identify three distinct detection signatures when ${}^{71}$Ge$^*$ is produced, two of which are significantly delayed in time and could be detected within a single large GAGG volume. Further optimizations can be made by optically isolating smaller segments of GAGG to maximize the probability of a spatial separation between the prompt/delayed signals. We construct and test prototype GAGG detectors capable of sub 7% energy resolution @ ${}^{137}$Cs and reliable detection of spatially-separated ${}^{57}$Co double-pulse decays.