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.
Division Spotlight
Human Factors, Instrumentation & Controls
Improving task performance, system reliability, system and personnel safety, efficiency, and effectiveness are the division's main objectives. Its major areas of interest include task design, procedures, training, instrument and control layout and placement, stress control, anthropometrics, psychological input, and motivation.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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
Mar 2025
Jul 2024
Latest Journal Issues
Nuclear Science and Engineering
March 2025
Nuclear Technology
Fusion Science and Technology
February 2025
Latest News
ANS 2025 election is open
The American Nuclear Society election is now open. Members can vote for the Society’s next vice president/president-elect and treasurer as well as six board members (four U.S. directors, one non-U.S. director, and one student director). Completed ballots must be submitted by 1:00 p.m. (EDT) on Tuesday, April 15, 2025.
George N. Salaita, Andrew Robeson
Nuclear Science and Engineering | Volume 46 | Number 2 | November 1971 | Pages 214-222
Technical Paper | doi.org/10.13182/NSE71-A22355
Articles are hosted by Taylor and Francis Online.
The diffusion parameters for mixtures of 0, 20, 50, 80, and 100% D2O in H2O have been measured by the pulsed-neutron method at temperatures near the freezing point and in ice at -20°C. A 250-keV Cockcroft-Walton accelerator was used to produce neutron bursts in cylindrical samples by the 2K(d,n)3Re reaction. The waiting time method was used for establishment of the asymptotic spectrum in each sample. The infinite medium decay constants for D2O were evaluated from known density and nuclear cross-section data; those for H2O, H2O ice, and (H2O + D2O) mixtures were determined by a three parameter least-squares fit of the experimental data to the equation λ = λ0 + DoB2 - CB4. An iterative procedure was used to make the value of the extrapolated distance compatible with the diffusion coefficient D0 derived from the least-squares analysis. The results are compared with those of similar measurements by other workers for H2O and D2O at various temperatures. The effect of the liquid-solid phase transition on the diffusion coefficient and diffusion cooling coefficient in H2O and D2O is discussed. The expression D0 = 1 / αi/D0,i, where αi and D0,i are the fractional volume and diffusion coefficient of the i’th component of the mixture, respectively, gave lower values than the experimental results for the mixtures.