China's Jiangmen Underground Neutrino Observatory (JUNO) Nears Completion
With a wall thickness of 120 mm and a weight of more than 600 tons, the plexiglass spherical structure's production and construction are unprecedented. Upon completion, it will be filled with 20,000 tons of liquid scintillator, the target substance for capturing neutrinos. Liquid scintillation counting is the measurement of radioactive activity. It uses the technique of mixing an active material with a liquid scintillator and counting the resultant photon emissions. It will be used at JUNO for the detection of cosmic neutrinos.
Neutrinos are fundamental particles that far outnumber all the atoms in the universe, but rarely interact with other matter. Astrophysicists are particularly interested in high-energy neutrinos that have energies up to 1,000 times greater than those produced by the most powerful particle colliders on Earth. They think the most extreme events in the universe, like violent galactic outbursts, accelerate particles to nearly the speed of light. Those particles then collide with light or other particles to generate high-energy neutrinos. The first confirmed high-energy neutrino source, announced in 2018, was a type of active galaxy called a blazar.
Learn more about the Jiangmen Underground Neutrino Observatory:
Duration: 3 minutes
Release Date: Oct. 15, 2024
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