SMALL BOY SHOT FALLOUT RESEARCH PROGRAM 71 Further detailed analyses of the available data are needed to verify or adjust the values of several of the parameters, as described in this preliminary analysis of the reported data, for more accurate evaluations of the intensity—activity ratios and the fraction of device accounted for within the fallout pattern. REFERENCES 1. P. D. LaRiviere, Hong Lee, and K. H. Larson, Jonization Rate Measurements, Project 2.11, Operation Sun Beam Report POR-2217, April 1964. (Classified) . P. D. LaRiviere, J. D. Sartor, W. B. Lane, and K. H. Larson, Fallout Collection and Gross Sample Analysis, Project 2.9, Operation Sun Beam Report POR-2215, October 1964. (Classified) . E. C. Freiling, L. R. Bunney, and F. K. Kawahara, Physiochemical and Radiochemical Analysis, Project 2.10, Operation Sun Beam Report POR- 2216, October 1964. (Classified) . C. F. Miller, Response Curves for USNRDL 4-pi Ionization Chamber, Report USNRDL-TR-155, U. 5. Naval Radiological Defense Laboratory, May 1957. . C.F. Miller and P. Loeb, Ionization Rate and Photon Pulse Decay of Fission Products from the Slow-Neutron Fission of U-235, Report USNRDL-TR-247, U. 8. Naval Radiological Defense Laboratory, August 1958. P. D. LaRiviere, Response of a Low-Geometry Scintillation Counter to Fission and Other Products, Report USNRDL-TR-303, U.S. Naval Radiological Defense Laboratory, February 1959. . W. B. Lane, Stanford Research Institute, private communication, July 1964. C. F. Miller, Fallout and Radiological Countermeasures, Vol. I, Stanford Research Institute, Project IMU-4021, January 1963. . Samuel Glasstone (Ed.), The Effects of Nuclear Weapons, Revised Edition, U. 8S. Government Printing Office, Washington, D. C., 1962. 10. L. Machta, Meteorological Processes in the Transport of Weapon Radioiodine, Health Phys., 9(12): 1123-1132 (1963).