ANS is committed to advancing, fostering, and promoting the development and application of nuclear sciences and technologies to benefit society.
Explore the many uses for nuclear science and its impact on energy, the environment, healthcare, food, and more.
Division Spotlight
Accelerator Applications
The division was organized to promote the advancement of knowledge of the use of particle accelerator technologies for nuclear and other applications. It focuses on production of neutrons and other particles, utilization of these particles for scientific or industrial purposes, such as the production or destruction of radionuclides significant to energy, medicine, defense or other endeavors, as well as imaging and diagnostics.
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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Nuclear Science and Engineering
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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 77 | Number 2 | February 1981 | Pages 146-152
Technical Paper | doi.org/10.13182/NSE81-A21348
Articles are hosted by Taylor and Francis Online.
The absolute yields of 28 fission products representing 23 different mass chains produced by thermal-neutron fission of 239Pu and having half-lives between 30 and 1100 s have been determined using Ge(Li) spectroscopy methods. Spectra of 30 gamma rays emitted in the decay of the fission products between 35 and 1950 s after a 5-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 number of fissions was determined by direct comparison of gamma rays emanating from fission products created during a careful irradiation of a well-calibrated 239Pu-loaded fission chamber. The resulting fission-product yields are compared with previous measurements and with recommended yields given in two recent (and independent) evaluations. Uncertainties assigned to the present results range between 6 and 45%, and are smaller than or comparable to uncertainties assigned to previous experimental or evaluated yields for six mass chains.