ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Explore membership for yourself or for your organization.
Conference Spotlight
2025 ANS Winter Conference & Expo
November 9–12, 2025
Washington, DC|Washington Hilton
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!
Latest Magazine Issues
Oct 2025
Jul 2025
Latest Journal Issues
Nuclear Science and Engineering
November 2025
Nuclear Technology
Fusion Science and Technology
Latest News
Leading the charge: INL’s role in advancing HALEU production
Idaho National Laboratory is playing a key role in helping the U.S. Department of Energy meet near-term needs by recovering HALEU from federal inventories, providing critical support to help lay the foundation for a future commercial HALEU supply chain. INL also supports coordination of broader DOE efforts, from material recovery at the Savannah River Site in South Carolina to commercial enrichment initiatives.
Shee-Ming Chen, Leon J. Lidofsky
Nuclear Science and Engineering | Volume 29 | Number 2 | August 1967 | Pages 198-209
Technical Paper | doi.org/10.13182/NSE67-A18528
Articles are hosted by Taylor and Francis Online.
From pulsed-neutron measurements, the most probable slowing down times of 14.1-MeV neutrons to 1.1 and 0.8 eV in water are found to be 1.55 ± 0.15 and 1.85 ± 0.15 µsec, using cadmium-shielded 6LiI scintillators at distances 10 to 50 cm from the source. No spatial dependence can be found. Subsequent Monte Carlo study of 120 000 neutron cases not only confirms the experimental results, but also yields a more detailed space-energy-time neutron distribution as well as average slowing down times to various epithermal energies.
