Stars in Photographic Emulsions Initiated by Protons

Abstract
A study has been made of stars in photographic emulsions initiated by protons from the 184-inch Berkeley cyclotron. Ilford G-5 emulsions were exposed to the deflected proton beam with various Al absorbers interposed to obtain protons of various energies. Both the average number of prongs per star and the cross section for star production were found to increase with increasing proton energy.

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