AFSWP TECHNICAL REPORT AFSWP-978 EVALUATION OF RADIOACTIVE FALL-OUT by Roy D. Maxwell Roger W. Paine, Jr. Thomas E. Shea, Jr. Harold H. Mitchell Edwin R. Ballinger WEAPONS EFFECTS DIVISION Armed Forces Special Weapons Project Reports are documents prepared by staff sections of this headquarters for the purpose of disseminating latest available information to authorized agencies of the three services. They are official AFSWP documents and as such represunt the AFSWP position on information contained. HEHE This document contains information affecting the national. defense of the United States within the meaning of the Espionage Laws, Title 18, U.S.C., Sections 793 and 794. The transmission or the revelation of its contents in any manner to an unauthorized person is prohibited by law. eeHEE This document contains RESTRICTED DATA within the meaning of the Atomic Energy Act of 1954. Its transmission or the revelation of its contents, in any manner not authorized by that Act, is prohibited by law. HEH Reproduction of this document in whole or in part is prohibited except with the permission of the Chief, AFSWP. ee ee é September 1955 HEADQUARTERS, ARMED FORCES SPECIAL WEAPONS PROJECT : Washington 25, D.C. ii