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

Journal Article · · Nuclear Data Sheets
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  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Colorado School of Mines, Golden, CO (United States)
  3. Univ. of California, Davis, CA (United States)
  4. Abilene Christian Univ., TX (United States)
  5. Univ. of California, Davis, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  6. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  7. Colorado School of Mines, Golden, CO (United States); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  8. California Polytechnic State Univ. (CalPoly), San Luis Obispo, CA (United States)
  9. Oregon State Univ., Corvallis, OR (United States)
  10. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Avrio Analytics, Knoxville, TN (United States)
  11. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  12. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
+ Show Author Affiliations

In this work, the 239Pu(n,f)/235U(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.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA), Nuclear Criticality Safety Program (NCSP)
Contributing Organization:
The NIFFTE Collaboration
Grant/Contract Number:
AC52-07NA27344; 89233218CNA000001; NA0002921
OSTI ID:
1837359
Report Number(s):
LLNL-JRNL-813349; 1019432; TRN: US2300425
Journal Information:
Nuclear Data Sheets, Vol. 178; ISSN 0090-3752
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (49)

FIG. 1(p. 4)figure FIG. 1
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TABLE IV: Part 1(p. 38)table TABLE IV: Part 1
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