Radioautographic method for examining distribution of particles in a cyclotron beam

M. L. Pool, S. Fultz
naca-tn-2650
Mar 1952


It has been found that radioautographs of activated metal foil provide a means for obtaining the relative distribution of particles emitted from the foil and hence also provide a means for obtaining the time-averaged distribution of particles in the cross section of the beam which caused activation of the foil. This has been established in particular for Kodak super Pan Press B film, developed 8 minutes at 78 degrees F in DK-50 developer, provided the maximum photographic density of the radioautograph is kept below 1.1. The method has been confirmed by direct comparison of density values and count rates and has also been verified for higher energy components of the 8-rays emitted from the foils.

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