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Physics

Antimatter neutrinos detected from a nuclear reactor 240 km away

A water-based detector has been used to spot antineutrinos from nuclear reactions hundreds of kilometres away. It could be used to monitor distant nuclear activities

By Karmela Padavic-Callaghan

6 March 2023

Antineutrinos collide with protons inside the detector which creates positrons that move through water followed by a blue glow.

Antineutrinos colliding with protons generates a blue light

SNO+ Collaboration

Antimatter neutrinos created by a nuclear reactor were picked up by a detector located 240 kilometres away. The approach could be used to monitor nuclear activity from afar.

The universe is full of neutrinos and their antimatter counterparts called antineutrinos. They are commonly produced inside the sun and in nuclear reactors, but detecting them is difficult because they typically move through matter without affecting it. Despite this, Josh Klein at the University of Pennsylvania and his colleagues managed to record …

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