학술논문
Measurement of the $^{239}$Pu(n,f)/$^{235}$U(n,f) Cross-Section Ratio with the NIFFTE fission Time Projection Chamber
Document Type
Working Paper
Author
Snyder, L.; Anastasiou, M.; Bowden, N. S.; Bundgaard, J.; Casperson, R. J.; Cebra, D. A.; Classen, T.; Dongwi, D. H.; Fotiades, N.; Gearhart, J.; Geppert-Kleinrath, V.; Greife, U.; Hagmann, C.; Heffner, M.; Hensle, D.; Higgins, D.; Isenhower, L. D.; Kazkaz, K.; Kemnitz, A.; King, J.; Klay, J. L.; Latta, J.; Leal-Cidoncha, E.; Loveland, W.; Magee, J. A.; Manning, B.; Mendenhall, M. P.; Monterial, M.; Mosby, S.; Neudecker, D.; Prokop, C.; Sangiorgio, S.; Schmitt, K. T.; Seilhan, B.; Tovesson, F.; Towell, R. S.; Walsh, N.; Watson, T. S.; Yao, L.; Younes, W.
Source
Subject
Language
Abstract
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.