Snapshots of Speedy Protons: SLAC’s Ultrafast “Electron Camera” Freezes Time

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Snapshots of Speedy Protons: SLAC’s Ultrafast “Electron Camera” Freezes Time
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Science, Space and Technology News 2023

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Scientists have caught fast-moving hydrogen atoms – the keys to countless biological and chemical reactions – in action. To get to the answers they were looking for, a team led by SLAC scientist Thomas Wolf, put MeV-UED, SLAC’s ultrafast electron diffraction camera to work. They used gas-phase ammonia, which has three hydrogen atoms attached to a nitrogen atom. The team struck ammonia with ultraviolet light, dissociating, or breaking, one of the hydrogen-nitrogen bonds, then fired a beam of electrons through it and captured the diffracted electrons.

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