Development of wide range photon detection system for muonic X-ray spectroscopy

TL;DR

This paper presents a newly developed photon detection system utilizing high-purity germanium detectors with BGO suppressors, optimized for muonic X-ray spectroscopy, demonstrating high accuracy and efficiency in experimental conditions.

Contribution

The paper introduces a novel photon detection system specifically designed for muonic X-ray spectroscopy, including a calibration method at muon facilities.

Findings

High energy and timing resolution achieved

Effective Compton suppression demonstrated

System maintains performance at high count rates

Abstract

We have developed a photon detection system for muonic X-ray spectroscopy. The detector system consists of high-purity germanium detectors with BGO Compton suppressors. The signals from the detectors are readout with a digital acquisition system. The absolute energy accuracy, energy and timing resolutions, photo-peak efficiency, the performance of the Compton suppressor, and high count rate durability are studied with standard $\gamma$-ray sources and in-beam experiment using $^{27}\mathrm{Al}(p, \gamma){}^{28}\mathrm{Si}$ resonance reaction. The detection system was demonstrated at Paul Scherrer Institute. A calibration method for a photon detector at a muon facility using muonic X-rays of $^{197}$Au and $^{209}$Bi is proposed.