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Isotopes & Radiation
Members are devoted to applying nuclear science and engineering technologies involving isotopes, radiation applications, and associated equipment in scientific research, development, and industrial processes. Their interests lie primarily in education, industrial uses, biology, medicine, and health physics. Division committees include Analytical Applications of Isotopes and Radiation, Biology and Medicine, Radiation Applications, Radiation Sources and Detection, and Thermal Power Sources.
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ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Latest News
First astatine-labeled compound shipped in the U.S.
The Department of Energy’s National Isotope Development Center (NIDC) on March 31 announced the successful long-distance shipment in the United States of a biologically active compound labeled with the medical radioisotope astatine-211 (At-211). Because previous shipments have included only the “bare” isotope, the NIDC has described the development as “unleashing medical innovation.”
Melvin M. Levine, Meyer Steinberg
Nuclear Science and Engineering | Volume 12 | Number 4 | April 1962 | Pages 498-504
Technical Paper | doi.org/10.13182/NSE62-A26097
Articles are hosted by Taylor and Francis Online.
A general solution for optimum design of a radiaton chemical reaction vessel having an internal uniform triangular array of long, thin γ-ray sources is derived. The dependence of chemical production rate on amount and distribution of radioactive material and on size and shape of vessel is accounted for. Values for two general design parameters (vessel efficiency, ψ, and unit cell efficiency, µ) as a function of the vessel diameter and source spacing are given and include radiation buildup. The rate equation expressed as a power law of the radiation intensity is combined with information on the dependence of cost of reactor vessel on volume and pressure. The total cost of source material and vessels is then minimized to determine optimum size and number of vessels and the number of curies of radiation. The rate and cost equations are applied to the radiation polymerization of ethylene. By the methods outlined here it is possible to determine the parameters of an optimum irradiation assembly. The dimensions of the vessel and source array and the quantity of radioactive source material necessary for a given rate of production are determined for the minimum cost condition.