Prompt-fission γ -ray spectral characteristics from Pu 239 (nth,f)

A. Gatera, T. Belgya, W. Geerts, A. Göök, F. J. Hambsch, M. Lebois, B. Maróti, A. Moens, A. Oberstedt, S. Oberstedt, F. Postelt, L. Qi, L. Szentmiklósi, G. Sibbens, D. Vanleeuw, M. Vidali, F. Zeiser

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Abstract

In this paper we present new results for prompt fission γ-ray spectral characteristics from the thermal neutron induced fission of Pu∗240. The measured spectra were unfolded by using the detectors' response functions, simulated with geant4. We obtained in average per fission a γ-ray multiplicity Mγ=(7.35±0.12), a mean photon energy ϵγ=(0.85±0.02) MeV, and an average total energy released in fission Ēγ,tot=(6.27±0.11) MeV. Our results are in good agreement with historical data measured in the 1970s by Verbinski et al. and results from recent calculations in the framework of Monte Carlo Hauser-Feshbach models. Our measured average total energy is slightly smaller than the one deduced previously and present in evaluated data. From this we conclude that the Pu239(nth,f) reaction may be ruled out as possible source of γ heating underestimation, when compared with benchmark calculations based on existing nuclear data.

Original languageEnglish
Article number064609
JournalPhysical Review C
Volume95
Issue number6
DOIs
Publication statusPublished - Jun 13 2017

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fission
rays
thermal neutrons
energy
heating
detectors
photons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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Gatera, A., Belgya, T., Geerts, W., Göök, A., Hambsch, F. J., Lebois, M., ... Zeiser, F. (2017). Prompt-fission γ -ray spectral characteristics from Pu 239 (nth,f). Physical Review C, 95(6), [064609]. https://doi.org/10.1103/PhysRevC.95.064609

Prompt-fission γ -ray spectral characteristics from Pu 239 (nth,f). / Gatera, A.; Belgya, T.; Geerts, W.; Göök, A.; Hambsch, F. J.; Lebois, M.; Maróti, B.; Moens, A.; Oberstedt, A.; Oberstedt, S.; Postelt, F.; Qi, L.; Szentmiklósi, L.; Sibbens, G.; Vanleeuw, D.; Vidali, M.; Zeiser, F.

In: Physical Review C, Vol. 95, No. 6, 064609, 13.06.2017.

Research output: Contribution to journalArticle

Gatera, A, Belgya, T, Geerts, W, Göök, A, Hambsch, FJ, Lebois, M, Maróti, B, Moens, A, Oberstedt, A, Oberstedt, S, Postelt, F, Qi, L, Szentmiklósi, L, Sibbens, G, Vanleeuw, D, Vidali, M & Zeiser, F 2017, 'Prompt-fission γ -ray spectral characteristics from Pu 239 (nth,f)', Physical Review C, vol. 95, no. 6, 064609. https://doi.org/10.1103/PhysRevC.95.064609
Gatera, A. ; Belgya, T. ; Geerts, W. ; Göök, A. ; Hambsch, F. J. ; Lebois, M. ; Maróti, B. ; Moens, A. ; Oberstedt, A. ; Oberstedt, S. ; Postelt, F. ; Qi, L. ; Szentmiklósi, L. ; Sibbens, G. ; Vanleeuw, D. ; Vidali, M. ; Zeiser, F. / Prompt-fission γ -ray spectral characteristics from Pu 239 (nth,f). In: Physical Review C. 2017 ; Vol. 95, No. 6.
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AU - Geerts, W.

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AU - Maróti, B.

AU - Moens, A.

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AU - Oberstedt, S.

AU - Postelt, F.

AU - Qi, L.

AU - Szentmiklósi, L.

AU - Sibbens, G.

AU - Vanleeuw, D.

AU - Vidali, M.

AU - Zeiser, F.

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