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RADIOI.SOTOPES SERIES 75 Commanding General Medical Illustration Service Fifth Army Armed Forces Institute of Ft. Sheridan Pathology Chicago, Ulinois 60035 Walter Reed Medical Center Attn: Audio Visual Com- Washington, D. C. 20012 munications Center Attn: Audio Visual Com- munications Center Commanding General Sixth Army Presidio of San Francisco San Francisco, California 94118 Attn: Audio Visual Com- A WREN NQT AVA ILABLE munications Center ELSEWHERE, USE: Commanding General Military District of Washington Audio-Visual Branch Washington, D. C. 20305 Division of Public Information Attn: Audio Visual Com- U. S. Atomic Energy Commission munications Center Washington, D. C. 20545 FUNDAMENTALS OF RADIOACTIVITY (PMF-5145-A). 59 minutes. Sale price: $76.74. For loan source see Army Field Library Listing, page 74, This film traces uranium from prospector to the USAEC. It shows how uranium changes into other elements through radioactive decay and through nuclear fission. Mention is made of Einstein's equation E = me 2 , the atomic bomb, and use of nuclear power for industry. Stable and radioactive isotopes are explained, with isotope charts and energy level diagrams used to illustrate decay. Various radiations resulting from nuclear changes are described in detail. The nuclear reactor is described in terms of fission and moderation. Also shown are target materials introduced into a typical nuclear reactor and withdrawn as radioisotopes and the processing of fission products. More than fifty terms and concepts are defined and explained. PHYSICAL PRINCIPLES OF RADIOLOGICAL SAFETY (PMF-5145-liy 51 minutes. Sale price: $66.36. For loan source see Army Field Library Listing, page 74. This film introduces concepts of internal and external and acute and chronic radiation exposure by means of a historical sequence on hazards associated with X-ray and radium therapy and radium-dial painting. A discussion of ionization from external and internal sources of alpha, beta, and gamma radiation, with detailed explanations of roentgen and "equivalent" or "energy" roentgen, is presented. Maxi- mum permissible exposure and the theory of radiation-measuring in- struments are also discussed. Formulas are developed for computing dosage rates from internal sources. Concepts of single and continued uptake, physical decay, and biological elimination of activity, biological