It is believed that neutrinos underlie many open questions about the nature of the universe.
Rex Teilo, professorIndiana University Physics
A new study found thatlow-energy neutrinos interact with the argon nucleus through a weak nuclear force. It's like a ping-pong ball: also a neutrino hitting a nucleus transfers only a small amount of energy to a much larger nucleus, which bounces back almost imperceptibly.
The 2017 study was the basis for the discoveryyear, published in the journal Science, in which coherent collaborators used the world's smallest neutrino detector to prove the existence of the CEvNS process: in it, neutrinos interact with the larger and heavier nuclei of cesium and iodide.
Argon provides a kind of entrance, and the CEvNS process is similar to the building itself. Sodium and iodide were one door. Now we have opened another argon door.
Larger detectors perform better with highly accurate measurements, and the CENNS-10 detector technology is easy to scale up by simply adding more liquid argon.
After initial measurements showed,that in the experiment the background will not dominate, then coatings with a wavelength shift were applied to the photodetectors and internal reflectors: this significantly improved the collection of light. The detector was calibrated with Krypton-83m and added to liquid argon so that the number of photons present could be calculated.
The published results used 18 months data collected in CENNS-10. Analysis of the data obtained revealed 159 CEvNS events: this is also confirmed by the predictions of the standard model.
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