Response of Photographic Emulsions to Charged Particles and Neutrons

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Abstract
Using 340-Mev protons, 190-Mev deuterons, and 380-Mev alpha particles, the dosage sensitivity of 3 dosimeter films and one nuclear emulsion was studied. Dosage sensitivity curves were determined over values of ionization extending from minimum to maximum for singly-charged particles. Characteristic curves for the dosimeter films were identical in shape for all particle energies. At rates of specific ionization extending from minimum to 6 times minimum, characteristic curves for the nuclear emulsion were dependent on particle energy. Values of neutron film response were obtained for a Po-Be source and for the neutron spectra obtained by bombarding a Be target with 12-Mev protons and with 20-Mev deuterons. The dosimeter films were highly insensitive to neutrons and therefore useful as detectors of gamma rays in the presence of neutrons.

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