Fission Product Chain Yield Measurements [Slides]

Conference · Thu Oct 17 00:00:00 EDT 2019

DOI:https://doi.org/10.2172/1909999· OSTI ID:1909999

Bredeweg, Todd Allen ^[1]

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1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Fission product chain yields were historically determined by chemical separation and beta counting of fissile samples irradiated in carefully controlled fission chamber experiments. These measurements provided the means to extract absolute fission product yields (yield per fission, or Y_{$$\mathcal{i}$$}/$$\mathcal{f}$$ for the $$\mathcal{i}$$^{$$\mathcal{th}$$} fission product) that are included in the international nuclear data libraries, and ultimately used to model and characterize multiplying systems. However, reevaluations conducted at Los Alamos National Lab and Lawrence Livermore National Lab in 2005-2009 for neutron-induced fission of ²³⁵U and ²³⁹Pu highlighted disagreement among many of the measurements. This led to several new, targeted experimental programs to resolve these disagreements. In this presentation we will highlight recent efforts to address these discrepancies using energy-integral measurements at the National Criticality Experiments Research Center (NCERC) and outline our plans to complete the work over the next several years.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP); USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation
• DOE Contract Number: 89233218CNA000001
• OSTI ID: 1909999
• Report Number(s): LA-UR-19-30219
• Resource Relation: Conference: 2019 Fall Meeting of the APS Division of Nuclear Physics, Crystal City, Arlington, VA (United States), 14-17 Oct 2019; Related Information: https://meetings.aps.org/Meeting/DNP19/Session/RN.1
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
Nuclear Criticality Safety Program (NCSP)
Integral Experiments
Fission Products Yields (FPYs)
Highly Enriched Uranium (HEU)
Evaluated Nuclear Data File (ENDF)
National Criticality Experiments Research Center (NCERC)
R-Value
Q-Value