1. New prompt fission gamma-ray spectral data from 239Pu(nth, f) in response to a high priority request from OECD Nuclear Energy Agency.
- Author
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Gatera, Angélique, Belgya, Tamás, Geerts, Wouter, Göök, Alf, Hambsch, Franz-Josef, Lebois, Matthieu, Maróti, Boglárka, Oberstedt, Stephan, Oberstedt, Andreas, Postelt, Frederik, Liqiang Qi, Szentmiklósi, Laszló, Vidali, Marzio, and Zeiser, Fabio
- Subjects
SPONTANEOUS fission ,PHOTONS ,GAMMA rays ,NUCLEAR fission - Abstract
Benchmark reactor calculations have revealed an underestimation of γ -heat following fission of up to 28%. To improve the modelling of new nuclear reactors, the OECD/NEA initiated a nuclear data High Priority Request List (HPRL) entry for the major isotopes (
235 U,239 Pu). In response to that HPRL entry, we executed a dedicated measurement program on prompt fission γ -rays employing state-of-the-art lanthanum bromide (LaBr3) detectors with superior timing and good energy resolution. Our new results from252 Cf(sf),235 U(nth, f) and241 Pu(nth, f) provide prompt fission γ -ray spectra characteristics : average number of photons per fission, average total energy per fission and mean photon energy; all within 2% of uncertainty. We present preliminary results on239 Pu(nth, f), recently measured at the Budapest Neutron Centre and supported by the CHANDA Trans-national Access Activity, as well as discussing our different published results in comparison to the historical data and what it says about the discrepancy observed in the benchmark calculations. [ABSTRACT FROM AUTHOR]- Published
- 2017
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