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Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons

Publication ,  Journal Article
Bhatia, C; Fallin, B; Gooden, ME; Howell, CR; Kelley, JH; Tornow, W; Arnold, CW; Bond, EM; Bredeweg, TA; Fowler, MM; Moody, WA; Rundberg, RS ...
Published in: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
September 1, 2014

A program has been initiated to measure the energy dependence of selected high-yield fission products used in the analysis of nuclear test data. We present out initial work of neutron activation using a dual-fission chamber with quasi-monoenergetic neutrons and gamma-counting method. Quasi-monoenergetic neutrons of energies from 0.5 to 15 MeV using the TUNL 10 MV FM tandem to provide high-precision and self-consistent measurements of fission product yields (FPY). The final FPY results will be coupled with theoretical analysis to provide a more fundamental understanding of the fission process. To accomplish this goal, we have developed and tested a set of dual-fission ionization chambers to provide an accurate determination of the number of fissions occurring in a thick target located in the middle plane of the chamber assembly. Details of the fission chamber and its performance are presented along with neutron beam production and characterization. Also presented are studies on the background issues associated with room-return and off-energy neutron production. We show that the off-energy neutron contribution can be significant, but correctable, while room-return neutron background levels contribute less than <1% to the fission signal. © 2014 Elsevier B.V.

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Published In

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

DOI

ISSN

0168-9002

Publication Date

September 1, 2014

Volume

757

Start / End Page

7 / 19

Related Subject Headings

  • Nuclear & Particles Physics
  • 5106 Nuclear and plasma physics
  • 0299 Other Physical Sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences
 

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Bhatia, C., Fallin, B., Gooden, M. E., Howell, C. R., Kelley, J. H., Tornow, W., … Tonchev, A. P. (2014). Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 757, 7–19. https://doi.org/10.1016/j.nima.2014.03.022
Bhatia, C., B. Fallin, M. E. Gooden, C. R. Howell, J. H. Kelley, W. Tornow, C. W. Arnold, et al. “Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons.” Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 757 (September 1, 2014): 7–19. https://doi.org/10.1016/j.nima.2014.03.022.
Bhatia C, Fallin B, Gooden ME, Howell CR, Kelley JH, Tornow W, et al. Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2014 Sep 1;757:7–19.
Bhatia, C., et al. “Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons.” Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 757, Sept. 2014, pp. 7–19. Scopus, doi:10.1016/j.nima.2014.03.022.
Bhatia C, Fallin B, Gooden ME, Howell CR, Kelley JH, Tornow W, Arnold CW, Bond EM, Bredeweg TA, Fowler MM, Moody WA, Rundberg RS, Rusev G, Vieira DJ, Wilhelmy JB, Becker JA, Macri R, Ryan C, Sheets SA, Stoyer MA, Tonchev AP. Dual-fission chamber and neutron beam characterization for fission product yield measurements using monoenergetic neutrons. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2014 Sep 1;757:7–19.
Journal cover image

Published In

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

DOI

ISSN

0168-9002

Publication Date

September 1, 2014

Volume

757

Start / End Page

7 / 19

Related Subject Headings

  • Nuclear & Particles Physics
  • 5106 Nuclear and plasma physics
  • 0299 Other Physical Sciences
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
  • 0201 Astronomical and Space Sciences