A Si(Li) solid state detector, CsI, LiF thermoluminescence dosimeters (TLD), and fast film were used to measure proton fluence, energy distribution, and depth dose in a cubical Lucite phantom exposed to beams of 20, 35, and 45 MeV protons. The recoiled deuterons and scattered protons from a deuteron gas chamber were used as a beam monitor during irradiation of the animals. The depth-dose measurements illustrate that thermoluminescence dosimeters can be used to estimate proton exposures in a Lucite phantom for 20-45 MeV protons. It also appears that TLD is relatively energy independent over this energy interval. Young Beagle dogs' eyes (100 days old) were exposed to 70, 125, 240, and 480 surface rads. The average dose to iris, lens and retina was calculated from the surface dose and the depth-dose curves. The maximum dose to the lens and retina was about 4.5 times the surface dose, respectively, for 35 MeV and 45 MeV protons. The maximum dose to the iris for the 20 MeV protons was about 2.6 times the surface dose. The results of this study were used to estimate the absorbed dose in the irradiation of the Beagle eye with protons as described in the second paper of this series (1).

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