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Conference Spotlight
2026 Annual Conference
May 31–June 3, 2026
Denver, CO|Sheraton Denver
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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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Latest News
Perpetual Atomics, QSA Global produce Am fuel for nuclear space power
U.K.-based Perpetual Atomics and U.S.-based QSA Global claim to have achieved a major step forward in processing americium dioxide to fuel radioisotope power systems used in space missions. Using an industrially scalable process, the companies said they have turned americium into stable, large-scale ceramic pellets that can be directly integrated into sealed sources for radioisotope power systems, including radioisotope heater units (RHUs) and radioisotope thermoelectric generators (RTGs).
N. B. Sullivan, J. J. Egan, G. H. R. Kegel, P. Harihar
Nuclear Science and Engineering | Volume 70 | Number 3 | June 1979 | Pages 294-297
Technical Paper | doi.org/10.13182/NSE79-A20150
Articles are hosted by Taylor and Francis Online.
The absolute 125-deg differential gamma-ray production cross section for the 1780-keV transition in the 28Si(n,n′γ)28Si reaction has been measured from 1.96- to 4.15-MeV bombarding energy. This transition represents the decay of the 2+ first excited state to the 0+ ground state of 28Si. The data were corrected for neutron multiple scattering as well as neutron and gamma-ray attenuation in the sample. The angle-integrated neutron scattering cross section was inferred from the gamma-ray production data using the shape of the gamma-ray angular distributions obtained from compound nucleus statistical model calculations. Incident neutrons were produced via the 3H(p,n)3 He reaction using a target ∼100 keV thick for 3.5-MeV protons, and this energy spread is reflected in the structure observed in the cross section.
