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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).
G. Reffo and F. Fabbri
Nuclear Science and Engineering | Volume 66 | Number 2 | May 1978 | Pages 251-254
Technical Note | doi.org/10.13182/NSE78-A27206
Articles are hosted by Taylor and Francis Online.
The concepts of decay-width-pooled distributions and of effective number of degrees of freedom have proven helpful in the calculation of inelastic scattering cross sections and emitted particle spectra, where channels leading to the excitation of bands of levels in the continuum are open at energies low enough for the width fluctuation effects to remain sizable.