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Division Spotlight
Fuel Cycle & Waste Management
Devoted to all aspects of the nuclear fuel cycle including waste management, worldwide. Division specific areas of interest and involvement include uranium conversion and enrichment; fuel fabrication, management (in-core and ex-core) and recycle; transportation; safeguards; high-level, low-level and mixed waste management and disposal; public policy and program management; decontamination and decommissioning environmental restoration; and excess weapons materials disposition.
Meeting Spotlight
Utility Working Conference and Vendor Technology Expo (UWC 2024)
August 4–7, 2024
Marco Island, FL|JW Marriott Marco Island
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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Fusion Science and Technology
Latest News
The fire that powers the universe: Harnessing inertial fusion energy
It was a laser shot for the ages. By achieving fusion ignition on December 5, 2022, Lawrence Livermore National Laboratory proved that recreating the “fire” that fuels the sun and the stars inside a laboratory on Earth was indeed scientifically possible.
J. K. Dickens, J. W. McConnell, K. J. Northcutt
Nuclear Science and Engineering | Volume 80 | Number 3 | March 1982 | Pages 455-461
Technical Note | doi.org/10.13182/NSE82-A19832
Articles are hosted by Taylor and Francis Online.
The absolute yields of 39 fission products representing 30 different mass chains produced by thermal neutron fission of 229Th and having half-lives between 15 and 4600 s have been determined using Ge(Li) spectroscopy methods. Spectra of gamma rays emitted in the decay of the fission products between 25 and 2400 s after a 15-s irradiation were obtained. Gamma rays were assigned to the responsible fission products by matching gamma-ray energies and half-lives. Fission product yields were then obtained from the data by first determining the appropriate gamma-ray activity as of the end of the irradiation, correcting for detector efficiency and gamma-ray branching ratio, and, finally, dividing by the number of fissions created in the sample. The resulting fission product yields are compared with previous measurements and with recommended yields given in the recent ENDF/B evaluation. Relative uncertainties assigned to the present results range between 6 and 65%, with an absolute normalization uncertainty of 13%. The present uncertainties are smaller than or comparable to uncertainties assigned to previous experimental or evaluated yields for 16 mass chains.