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Division Spotlight
Young Members Group
The Young Members Group works to encourage and enable all young professional members to be actively involved in the efforts and endeavors of the Society at all levels (Professional Divisions, ANS Governance, Local Sections, etc.) as they transition from the role of a student to the role of a professional. It sponsors non-technical workshops and meetings that provide professional development and networking opportunities for young professionals, collaborates with other Divisions and Groups in developing technical and non-technical content for topical and national meetings, encourages its members to participate in the activities of the Groups and Divisions that are closely related to their professional interests as well as in their local sections, introduces young members to the rules and governance structure of the Society, and nominates young professionals for awards and leadership opportunities available to members.
Meeting Spotlight
ANS Student Conference 2025
April 3–5, 2025
Albuquerque, NM|The University of New Mexico
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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Prepare for the 2025 Nuclear PE Exam with ANS guides
The next opportunity to earn professional engineer (PE) licensure in nuclear engineering is this fall, and now is the time to sign up and begin studying with the help of materials like the online module program offered by the American Nuclear Society.
Warren Fenton Stubbins, David M. Barton, and Frank D. Lonadier
Nuclear Science and Engineering | Volume 25 | Number 4 | August 1966 | Pages 377-382
Technical Paper | doi.org/10.13182/NSE66-A18557
Articles are hosted by Taylor and Francis Online.
The production cross sections where α = σc/σf for 238Pu and 239Pu, have been compared in the fast neutron flux at the center of a bare spherical critical assembly of 239Pu. These quantities averaged by the fast-neutron spectrum indicate nearly the same properties for the even-even 238Pu nucleus as for the odd-even 239Pu nucleus. The ratio measured in a neutron flux peaked at 0.25 MeV with an average neutron energy = 1.67 MeV is (238Pu)/(239Pu) = 1.01 ± 0.06, and (238Pu) = 3.76 ± 0.23 b. The results of this study indicate that 238Pu metal probably has a critical mass of the same order of magnitude as 239Pu metal.
