Title: New prompt fission gamma-ray spectral data from 239Pu(nth, f) in response to a high priority request from OECD Nuclear Energy Agency
Authors: GATERA ANGELIQUEBELGYA T.GEERTS WOUTERGÖÖK ALFHAMBSCH FRANZ-JOSEFLEBOIS M.MARÓTI B.OBERSTEDT STEPHANOBERSTEDT A.POSTELT F.QI LIQIANGSZENTMIKLOSI L.VIDALI MARZIOZEISER F.
Citation: EPJ Web of Conferences vol. 146 p. 04020
Publisher: EDP Sciences
Publication Year: 2017
JRC N°: JRC104071
ISSN: 2100 014X
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC104071
DOI: 10.1051/epjconf/201714604020
Type: Articles in periodicals and books
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 (235U, 239Pu). 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 from 252Cf(sf), 235U(nth,f) and 241Pu(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 will be presenting the latest results on 239Pu(nth,f), 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.
JRC Directorate:Nuclear Safety and Security

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