ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
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Division Spotlight
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.
Meeting Spotlight
International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2025)
April 27–30, 2025
Denver, CO|The Westin Denver Downtown
Standards Program
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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June 2025
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May 2025
Latest News
DTE Energy studying uprate at Fermi-2, considers Fermi-3’s prospects
DTE Energy, the owner of Fermi nuclear power plant in Michigan, is considering an extended uprate for Unit 2 that would increase its 1,100-MW generation capacity by 150 MW.
K. F. Flynn, L. E. Glendenin, E. P. Steinberg
Nuclear Science and Engineering | Volume 22 | Number 4 | August 1965 | Pages 416-419
Technical Paper | doi.org/10.13182/NSE65-A20627
Articles are hosted by Taylor and Francis Online.
Half-lives have been measured by direct decay for 18 radionuclides. The method of least squares was used to obtain the best straight-line fit to the data. The observed half-lives are 87.9 ± 0.3 d for S35, 52.7 ± 0.5 d for Sr89, 13.6 ± 0.3 y for Nb93m, 35.8 ± 0.5 d for Nb95, 65.5 ± 0.2 d for Zr95, 39.5 ± 0.3 d for Ru103, 368.0 ± 1.8 d for Ru106, 13.6 ± 0.2 y for Cd113, 76.3 ± 6.6 y for Sn121, 2.71 ± 0.02 y for Sb125, 1.99 ± 0.02 y for Cs134, 283.8 ± 0.6 d for Ce144, 2.60 ± 0.02 y for Pm147, 87 ± 9 y for Sm151, 134.2 ± 0.8 d for Tm170, 700± 5 d for Tm171, 3.68 ± 0.05 y for Tl204, and 164.4 ± 0.4 d for Cm242. These data are compared with current literature values, and average values of the existing determinations are given.
