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Detectors and sensors

Detectors and sensors

‘Physical cryptography’ uses neutrons to compare nuclear warheads

26 Sep 2016 Hamish Johnston
The weapons-verification-technique set-up
No knowledge: the weapons-verification-technique set-up showing the array of bubble neutron detectors (left), the metal blocks (centre) and the neutron source (right). (Courtesy: Elle Starkman)
A new technique for comparing physical objects – while keeping the composition of the objects secr

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Hamish Johnston is an online editor of Physics World
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