Measurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

A. Kemnitz; B. Manning; B. Seilhan; C. Hagmann; C. Prokop; D.A. Cebra; D.H. Dongwi; D. Hensle; D. Higgins; D. Neudecker

arxiv: 2107.02881 · v1 · pith:WDP3SPNJ · submitted 2021-07-06 · nucl-ex

Measurement of the ²³⁹Pu(n,f)/²³⁵U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

L. Snyder , M. Anastasiou , N.S. Bowden , J. Bundgaard , R.J. Casperson , D.A. Cebra , T. Classen , D.H. Dongwi

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N. Fotiades J. Gearhart V. Geppert-Kleinrath U. Greife C. Hagmann M. Heffner D. Hensle D. Higgins L.D. Isenhower K. Kazkaz A. Kemnitz J. King J.L. Klay J. Latta E. Leal-Cidoncha W. Loveland J.A. Magee B. Manning M.P. Mendenhall M. Monterial S. Mosby D. Neudecker C. Prokop S. Sangiorgio K.T. Schmitt B. Seilhan F. Tovesson R.S. Towell N. Walsh T.S. Watson L. Yao W. Younes

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keywords cross-sectionmeasurementratiochamberfissionfissiontpcprojectionprovides

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The $^{239}$Pu(n,f)/$^{235}$U(n,f) cross-section ratio has been measured with the fission Time Projection Chamber (fissionTPC) from 100 keV to 100 MeV. The fissionTPC provides three-dimensional reconstruction of fission-fragment ionization profiles, allowing for a precise quantification of measurement uncertainties. The measurement was performed at the Los Alamos Neutron Science Center which provides a pulsed white source of neutrons. The data are recommended to be used as a cross-section ratio shape. A discussion of the status of the absolute normalization and comparisons to ENDF evaluations and previous measurements is included.

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Measurement of the ²³⁹Pu(n,f)/²³⁵U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber

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