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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.
Warren F. Miller, Jr., Edward W. Larsen
Nuclear Science and Engineering | Volume 93 | Number 4 | August 1986 | Pages 403-410
Technical Note | doi.org/10.13182/NSE86-A18475
Articles are hosted by Taylor and Francis Online.
The diffusion synthetic acceleration (DSA) method is an iterative procedure for obtaining rapidly convergent numerical solutions of discrete ordinates problems. General PL acceleration methods for L>1 are first considered to determine if DSA, which is equivalent to P1 acceleration, is optimum. After determining that DSA appears to be the optimum PL approach, it is then demonstrated that by also using standard techniques of matrix iterative acceleration, modest improvements can be made in DSA performance.