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Conference Spotlight
Nuclear Energy Conference & Expo (NECX)
September 8–11, 2025
Atlanta, GA|Atlanta Marriott Marquis
Standards Program
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.
Yung-An Chao, Aquilino Senra Martinez
Nuclear Science and Engineering | Volume 66 | Number 2 | May 1978 | Pages 254-258
Technical Note | doi.org/10.13182/NSE66-254
Articles are hosted by Taylor and Francis Online.
The mathematical problem of approximating the neutron escape probability junction is studied through an analysis of the moment expansion of the junction. The problem with possible divergence of the expansion is identified and avoided by devising an alternative based on physical arguments. An approximation of general validity for any convex geometry is thus deduced that is simple, accurate, and convenient for use. As examples, numerical results are presented for three geometries: a sphere, a cylinder, and a slab.
