Dark-matter detector hears first particle pops | symmetry magazine

 

Dark-matter detector hears first particle pops | symmetry magazine.

– extracts from the article –

The COUPP-60 experiment, based a mile and a half underground at SNOLAB in Canada, searches for dark-matter particles passing through a heated mixture of purified water and CF3I, a chemical used in fire extinguishers. Particles passing through the liquid interact with it, leaving behind a small amount of energy—just enough to cause the liquid to boil.

Dark-matter particles, which scientists think rarely interact with other matter, should form individual bubbles in the COUPP-60 tank, while regular-matter particles such as neutrons interact with atoms in the liquid much more often and should leave a trail of multiple bubbles as they pass through.

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