Journal articles
From fission yield measurements to evaluation: status on statistical methodology for the covariance question
Abstract : Studies on fission yields have a major impact on the characterization and the understanding of the
fission process and are mandatory for reactor applications. Fission yield evaluation represents the synthesis of
experimental and theoretical knowledge to perform the best estimation of mass, isotopic and isomeric yields.
Today, the output of fission yield evaluation is available as a function of isotopic yields. Without the explicitness
of evaluation covariance data, mass yield uncertainties are greater than those of isotopic yields. This is in
contradiction with experimental knowledge where the abundance of mass yield measurements is dominant.
These last years, different covariance matrices have been suggested but the experimental part of those are
neglected. The collaboration between the LPSC Grenoble and the CEA Cadarache starts a new program in the
field of the evaluation of fission products in addition to the current experimental program at Institut Laue-
Langevin. The goal is to define a new methodology of evaluation based on statistical tests to define the different
experimental sets in agreement, giving different solutions for different analysis choices. This study deals with the
thermal neutron induced fission of $^{235}$U. The mix of data is non-unique and this topic will be discussed using the
Shannon entropy criterion in the framework of the statistical methodology proposed.
Cited literature [18 references]
http://hal.in2p3.fr/in2p3-01624239
Contributor : Emmanuelle Vernay <>
Submitted on : Wednesday, October 2, 2019 - 10:47:04 AM
Last modification on : Thursday, November 19, 2020 - 1:01:54 PM
Contributor : Emmanuelle Vernay <>
Submitted on : Wednesday, October 2, 2019 - 10:47:04 AM
Last modification on : Thursday, November 19, 2020 - 1:01:54 PM
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