# Response of a Li-glass/multi-anode photomultiplier detector to $\alpha$-particles from $^{241}$Am

## TL;DR

This study investigates the spatial response of a Li-glass scintillator coupled with a multi-anode photomultiplier to alpha particles from Am-241, focusing on signal distribution and optimizing detection efficiency.

## Contribution

It provides detailed measurements of the detector's response to alpha particles and analyzes how threshold settings affect hit multiplicity and efficiency.

## Key findings

- Pixel signal varies significantly with position.
- Multiple pixels often register signals above threshold.
- Threshold optimization improves single-hit detection efficiency.

## Abstract

The response of a position-sensitive Li-glass scintillator detector to $\alpha$-particles from a collimated $^{241}$Am source scanned across the face of the detector has been measured. Scintillation light was read out by an 8 X 8 pixel multi-anode photomultiplier and the signal amplitude for each pixel has been recorded for every position on a scan. The pixel signal is strongly dependent on position and in general several pixels will register a signal (a hit) above a given threshold. The effect of this threshold on hit multiplicity is studied, with a view to optimize the single-hit efficiency of the detector.