Tracks in a bubble chamber

Tracks in a bubble chamber

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Caption: The process of muon-catalysed nuclear fusion is seen in this photograph from the 25 cm diameter hydrogen bubble chamber at the Lawrence Berkeley Laboratory. A negative muon enters at bottom & is deflected first to the left & then sharply to the right, before decaying to an electron which curls down towards bottom left. The explanation is that the muon becomes bound to a nucleus of deuterium to form a neutron-like object that can 'invade' a hydrogen atom & bind with its proton. The proton & deuterium fuse into a nucleus of helium-3, releasing the muon which can then catalyse another fusion. In this case, the muon has catalysed a fusion at both points where it is deflected.

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Keywords: bubble chamber, electron, fusion, image, muon, muonic fusion, nuclear, particle physics, photo

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