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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. E. Slovacek, D. S. Cramer, E. B. Bean, J. R. Valentine, R. W. Hockenbury, R. C. Block
Nuclear Science and Engineering | Volume 62 | Number 3 | March 1977 | Pages 455-462
Technical Paper | doi.org/10.13182/NSE77-A26984
Articles are hosted by Taylor and Francis Online.
The 238U(n,f) cross section has been measured from 3 eV to ≃ 100 keV with the Rensselaer Intense Neutron Spectrometer, a 75-ton lead slowing down spectrometer at the Gaerttner Laboratory at Rensselaer Polytechnic Institute. Four fission ionization chambers containing a total of ≃ 0.8 g of 238U (4.1 ppm 235U) were used for the measurements. The fission widths of the 6.67-, 20.9-, and 36.8-eV resonances were measured as (10 ± 1), (58 ± 9), and (12 ±2) neV, respectively. By combining these fission results and published resonance parameters, the 238U thermal fission cross-section contribution from positive energy resonances was determined to be (2.7 ± 0.3) µb. The resonance fission integral from 0.4 eV to 100 keV was determined to be (1.30 ±0.15) mb.
