Project 2.12 Gamma Exposure vs Distance - P. Brown OBJECTIVES To determine gamma exposures as a function of distance from the point of detonation of a high yield air 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 ani on the ships stationed in the predicted fallout area, Some badges were exposed without q interruption, while others were exposed in sequence or shielded from the fallout by dropping mechanisms activated after blast arrival. RESULTS All dosimeters were recovered following the shot. Incomplete analysis indicates approximately l-r dose received by instruments on the reef stations between Nam (Charlie) and Yurochi (Dog), and on the Yurochi (Dog) complex. This is in the expected dose range for the yield and distance involved, The shot point error precluded obtaining useful data from most stations. ' ~ sit be Fstwheeled LARL -23- i