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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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Inkjet droplets of radioactive material enable quick, precise testing at NIST
Researchers at the National Institute of Standards and Technology have developed a technique called cryogenic decay energy spectrometry capable of detecting single radioactive decay events from tiny material samples and simultaneously identifying the atoms involved. In time, the technology could replace characterization tasks that have taken months and could support rapid, accurate radiopharmaceutical development and used nuclear fuel recycling, according to an article published on July 8 by NIST.
G. Bitelli, M. Salvatores
Nuclear Science and Engineering | Volume 36 | Number 3 | June 1969 | Pages 309-314
Technical Paper | doi.org/10.13182/NSE69-A18729
Articles are hosted by Taylor and Francis Online.
In this paper a multigroup method in finite monodimensional geometry is presented for neutron distribution calculation from a given source distribution. This method is extended to neutron importance function calculation for a given detector distribution. Furthermore, it is shown how truncating the calculation at whatever collision, it is possible to evaluate the “residual” neutron distribution by means of usual methods in diffusion or transport theory. An application is presented related to the generalized perturbation methods and the numerical solution of problems of general interest.
