Interactions of 1.0-, 2.0-, and 3.0-Bev Protons with Ag and Br in Nuclear Emulsion

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Abstract
Stars produced in insensitive nuclear emulsions by 1.0-3.0 Bev protons have been classified into different groups depending on whether light fragments and/or fission fragments are emitted. Alpha particle spectra and angular distributions are presented for each of the various groups. The probability for light-fragment emission increases rapidly with increasing beam energy up to 2.0 Bev. The angular distribution of the light fragments is peaked forward but also shows a preference for emission at 90° to the beam. Fission events increase from ∼3% of the interactions with Ag and Br at 1.0 Bev to ∼11% at 3.0 Bev. Ranges and angular distributions are also given for the recoil and fission fragments.