For that, you need something like this gamma-ray spectroscope ... from a thallium-doped cesium iodide crystal and a silicon photomultiplier. The scintillator is potted in silicone in a 3D printed ...

That isn’t the only way to measure gamma radiation ... A perfect radiation sensor for lightweight and low power applications, and gives us the inspiration to put a high altitude balloon project ...

MACE is fitted with 1,424 diamond-turned mirror facets and over 1,000 photomultiplier tubes. Its cutting-edge design facilitates the detection of gamma rays from intense celestial occurrences such ...