Novel spectroscopy method detects trace gases from a distance

Novel spectroscopy method detects trace gases from a distance

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According to a research study published in Physical Review
Applied, a combination of IR and terahertz radiation (T-rays) can sniff out even trace amounts of harmful gases — from chemical spill effects to nerve gas attacks — in the air from up to 1 km away. Researchers at Duke University and the U.S. Army Aviation and Missile Research, Development and Engineering Center (AMRDEC), had a hand in developing the technology, which can
differentiate between various types of gases and chemicals under normal atmospheric pressure. It could make possible testing for radioactive byproducts from nuclear accidents, detecting air pollution or remotely sensing chemical weapons.