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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
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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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Hash Hashemian: Visionary leadership
As Dr. Hashem M. “Hash” Hashemian prepares to step into his term as President of the American Nuclear Society, he is clear that he wants to make the most of this unique moment.
A groundswell in public approval of nuclear is finding a home in growing governmental support that is backed by a tailwind of technological innovation. “Now is a good time to be in nuclear,” Hashemian said, as he explained the criticality of this moment and what he hoped to accomplish as president.
R. B. Perez, R. E. Uhrig
Nuclear Science and Engineering | Volume 17 | Number 1 | September 1963 | Pages 90-100
Technical Paper | doi.org/10.13182/NSE63-A17214
Articles are hosted by Taylor and Francis Online.
Use of a sinusoidally modulated source of neutrons is equivalent to “poisoning” a moderating medium with a 1/v poison. The inverse relaxation length of the neutron wave amplitude and the variation of the phase angle as a function of position are dependent upon the frequency of modulation and the neutron diffusion and thermalization parameters of the media in which the waves are being propagated. The neutron wave technique allows “poisoning” of solid moderators and provides a means of performing poisoning experiments for measuring nuclear properties of solid as well as liquid moderators. It should supplement the recent use of poisoning techniques in an attempt to reconcile discrepancy in the diffusion and thermalization parameters of moderators, as measured by pulsed neutron techniques. The neutron wave technique and the pulsed neutron technique are supplementary from an experimental viewpoint.