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
Materials Science & Technology
The objectives of MSTD are: promote the advancement of materials science in Nuclear Science Technology; support the multidisciplines which constitute it; encourage research by providing a forum for the presentation, exchange, and documentation of relevant information; promote the interaction and communication among its members; and recognize and reward its members for significant contributions to the field of materials science in nuclear technology.
Meeting Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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Latest News
NRC cuts fees by 50 percent for advanced reactor applicants
The Nuclear Regulatory Commission has announced it has amended regulations for the licensing, inspection, special projects, and annual fees it will charge applicants and licensees for fiscal year 2025.
Mark Goldsmith
Nuclear Science and Engineering | Volume 25 | Number 3 | July 1966 | Pages 236-241
Technical Paper | doi.org/10.13182/NSE66-A17830
Articles are hosted by Taylor and Francis Online.
The effects of spin polarization on the slowing down of neutrons in water is investigated. Spin-dependent scattering cross sections are derived from a combination of resonance parameters, experimental phase shifts, and optical model calculations. It is shown that the effect of polarization on the age of neutrons slowing down from an unpolarized plane source in an infinite moderator may be rigorously obtained from the P-1 approximation to the transport equation. One finds that the age of fission neutrons slowing down in water would be decreased by 0.8% by polarizing collisions with oxygen below 2.6 MeV were it not for depolarizing collisions with hydrogen that reduce this figure to 0.2%.
