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Did Feynman ever derive the Bragg equation as a particle representation using Feynman diagrams? And where is it available? I spoke to Freeman Dyson and he couldn't recall.

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Did you look at ? Its a massive compendium on feynman diagrams

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Thank you, but a search of text doesn't show any Feynman diagram for the Bragg equation. – George Pieczenik Jan 29 '12 at 15:37

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