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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.
M. Edward Anderson
Nuclear Technology | Volume 4 | Number 3 | March 1968 | Pages 142-147
Technical Paper and Note | doi.org/10.13182/NT68-A26377
Articles are hosted by Taylor and Francis Online.
The neutron yields of plutonium-beryllium (α,n) sources, made of nominal 239Pu, are increasing due to the buildup of 241Am, an alpha emitter, from the beta-decay of 241Pu which is present in these sources. Measured increases in yields are compared with predicted increases based on the isotopic composition of the plutonium used in these sources. In cases where the isotopic composition was not previously known, the composition was deduced from calorimetric measurements. Sources were found to have initial rates of increase of up to 2% per year. In all cases except one the measured rate of increase was in agreement with the predicted rate.
