Proton Depth Dose Distribution: 3-D Calculation of Dose Distributions from Solar Flare Irradiation
Interim rept. May-Nov 1988
TEXAS A AND M RESEARCH FOUNDATION COLLEGE STATION
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Relative depth dose distribution to the head from 3 typical solar flare proton events were calculated for 3 different exposure geometries 1 single directional radiation incident upon a fixed head 2 single directional radiation incident upon head rotating axially 2-D rotation and 3 omnidirectional radiation incident upon head 3-D rotation. Isodose distributions in the transverse plane intersecting isocenter are presented for each of the 3 solar flare events in all 3 exposure geometries. In all 3 calculation configurations the maximum predicted dose occurred on the surface of the head. The dose at the isocenter of the head relative to the surface dose for the 2-D and 3-D rotation geometries ranged from 2 to 19, increasing with increasing energy of the event. The calculations suggest the superficially located organs lens of the eye and skin are at greatest risk for the proton events studied here.