Y —_— (FLATHEAD) Project 2.1 ~ Gamma Exposure vs Distance - P, Brown OBJECTIVES To determine gamma exposures$5 a function of distance from the point of detonation of 2 «:: burst. To draw conclusions from the data concerning dosage contours and the validity of scaling laws for this type of shot. DESCRIPTION AND EXPERIMENTAL PROCEDURES Standard film badges and quartz fiber dosimeters were distributed at various positions throughout Bikini Atoll and on the ships stationed in the prejicted fallout area. Some badges were exposed without interruption, while others were exposed in sequence or shielded from fallout by dropping mechanisms activated after blast arrival. R=SULTS Sufficient data points were obtained from the fallout gamma-~ exposure stations to permit a good estimate of dosage contours upon detailed analysis. The initial gamma radiation exposure fits predicted values reasonably well. There are, however, some discrepancies which may be resolved on further analysis coupled with additional information on rere mi the makeup of the device. ne pole Laie RG 4 mere ame? Coe wan ne we Re ~ 17 ~ ="