Pie oe oo , vt om, — |"PRIVACY ACT MATERIAL REMOVED In view of its possible usefulness, the average shape of 3 cesium trend curves (Subjects _ and ) has been plotted as shown at the lower right hand curve of Fig. 19. It is hoped that upon closer examination of the various factors influencing fallout and its transmittal to man, it will be possible to offer, at some future date, an explanation of the behavior of the lower curve. III. Measurements on Some Residents of the Marshall Islands C.E. Miller and O. J. Steingraber Seven normal, healthy male residents of the Marshall Islands, unde: the medical supervision of Dr. Robert A. Conard ‘ . Table 9) of the Brookhaven National Laboratory and accompaniedby Mr. Jack Tobin ( __ Table 9) District Anthropologist for the Marshall Islands, were flown to this Laboratory on April 4, 1957 for whole body gamma-ray spectroscopy. Details on mode and extent of exposure, body content from bioassay and clinical course are described elsewhere.(4,5) Four of these men (Nas. 4, 7, 6, 9, Table 9), residents of Rongelap, and two others (Nos. 5 and 8), residents of Uterek, were among those eva- cuated to Kwajelein from the area of heavy fallout some 48 to 78 hours following the thermonuclear detonation of March, 1954. About 3 months later, Nos. 5 and 8&8 were returned to Uterek and the others moved to Majur The seventh man (No. 10) from Majuro, not exposed, served as a control a. though his diet was not typical since he worked at Trust Headquarters as did Mr. Tobin (No. 11, Fig. 20). Each subject's gamma-ray spectrum (see Fig. 20) was obtained using the standard chair position. Since the body burdens of the two Utere. subjects (Nos. 5 and 8) were relatively high, their gamma-ray spectra cou. be accurately measured utilizing the one-meter arc technique. The body burden of subjects 5 and 8 was then calculated using the one--meter arc technique described in an earlier report. (1) The one-~meter arc net K® + Cs!37 spectrum of _ (préviously determined) was subtracted from the spectrum of Subject 5,whereupon the gurve labeled “K*® subtracted” A185 21 was obtained representing the Zn and “excess” Cs!3? activity. A phantom spectrum and a Cs!9" phantom spectrum were obtained using presdwood phantoms of appropriate thickness. The zn® phantom spectrun was normalized so that the area under the Zn® photopeak matched theare | under the subject’s Zn® photopeak and the normalized spectrum subtracte-. This yielded the curve labeled “0.48 yc zn® subtracted” in Fig. 21. The Cs'37 phantom spectrum was then normalized to match the area under the subject’s remaining Cs photopeak. This normalized Cs!*? spectrum was subtracted from the above resultant spectrum and the residual’ curve label D3 3 501713 PRIVACY ACT MATE RIAL REMOVED