Ultrafast dissociation of molecules studied at BESSY II

An international team has tracked at BESSY II how heavy molecules — in this case bromochloromethane — disintegrate into smaller fragments when they absorb X-ray light. Using a newly developed analytical method, they were able to visualize the ultrafast dynamics of this process. In this process, the X-ray photons trigger a ‘molecular catapult effect’: light atomic groups are ejected first, similar to projectiles fired from a catapult, while the heavier atoms — bromine and chlorine — separate more slowly.
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