Gamma-ray astrophysics in the MeV band is an exciting field in astronomy due to its potential for multi-messenger astrophysics. It has, however, remained under-explored when compared to other wavelengths. One reason for this observational gap is the difficulties with measuring these high-energy photons and the requirement of large amounts of detection material. In this work, we investigate the usage of large-volume GAGG scintillators for use as a calorimeter in future MeV telescopes. We developed a 5 × 5 array calorimeter utilizing cm GAGG crystals with onsemi C-series SiPM readout. We tested the calorimeter at the High Intensity Gamma-ray Facility (HIGS) with monoenergetic beams ranging from 2–25 MeV. Finally, we also investigate larger cm crystals and characterize their response across their depth when their surface treatment is either polished or frosted.

中文翻译：

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探索用于 MeV 伽马射线天体物理学的大体积 GAGG 闪烁体


MeV 波段的伽马射线天体物理学因其在多信使天体物理学方面的潜力而成为天文学中一个令人兴奋的领域。然而，与其他波长相比，它仍未得到充分探索。造成这种观测差距的原因之一是测量这些高能光子的困难以及需要大量的检测材料。在这项工作中，我们研究了大体积 GAGG 闪烁体在未来 MeV 望远镜中用作量热计的用途。我们开发了一款 5 × 5 阵列热量计，采用 cm GAGG 晶体和 onsemi C 系列 SiPM 读数装置。我们在高强度伽马射线设施 (HIGS) 中使用 2-25 MeV 的单能束测试了量热计。最后，我们还研究了较大的厘米晶体，并表征了当其表面处理为抛光或磨砂时它们在深度上的响应。