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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.”
R. H. Fulmer, T. F. Ruane
Nuclear Technology | Volume 3 | Number 3 | March 1967 | Pages 191-198
Technical Paper and Note | doi.org/10.13182/NT67-A27874
Articles are hosted by Taylor and Francis Online.
A method of determining slow neutron spectra from foil activations is described. Two sets of activants are irradiated; one set is composed of nuclides each of which has only one predominant resonance in the few electron volt (eV) region (resonance set); the other is composed of nuclides which, as a group, present a variety of absorption cross sections for neutrons in the subcadmium energy range (subcadmium set). For reliability of analysis and insensitivity to experimental uncertainties, a suitable form for the neutron spectrum is found to be basically a Maxwellian plus 1/E form with variable parameters. The spectrum is written as where K and b are parameters obtained directly from the absorption rates of the cadmium-covered resonance detectors. The remaining spectral parameters G, E0, and c are chosen to produce a spectrum from which are computed absorption rates of the irradiated foils in the subcadmium set. Values of G, E0, and c are varied until the computed absorption rates give a least-squares fit to the measured absorption rates. The activation method has been applied in two reactor cores. The predicted spectra are compared with corresponding spectra calculated by SWAK and SWAKRAUM. There is reasonably good agreement between the spectra predicted by experiment and calculation.