Flash Physics: New radiation detectors, agreement on Cherenkov observatory and artificial …

Flash Physics is our daily pick of the latest need-to-know developments from the global physics community selected by Physics World’s team of editors and reporters Affordable radiation detectors made from new crystalsLow cost: a lead-halide perovskite single crystal Low-cost single crystals that are very good at detecting gamma rays have been created in Switzerland by researchers at the Empa materials lab and ETH Zurich. Maksym Kovalenko and colleagues have shown that the material works just as well as expensive cadmium-telluride crystals, but can be grown using low-cost solvents or even water. The new lead-halide perovskite crystals meet three important criteria for making gamma-ray detectors. They are composed of high-atomic-number elements such as lead, so they are good absorbers of gamma rays. Also, the crystals are semiconductors with extremely long-lived and…


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