Prompt fission γ-rays from the reactions 252Cf(SF) and 235U(nth, f) – new data

S. Oberstedt; T. Belgya; R. Billnert; T. Bryś; W. Geerts; F.-J. Hambsch; Z. Kis; T. Martinez; A. Oberstedt; L. Szentmiklosi; M. Vidali

doi:10.1051/epjconf/20136202003

Proceedings

Open Access

EPJ Web of Conferences 62, 02003 (2013)
https://doi.org/10.1051/epjconf/20136202003

Prompt fission γ-rays from the reactions ²⁵²Cf(SF) and ²³⁵U(n_th, f) – new data

S. Oberstedt¹^a, T. Belgya², R. Billnert¹^,3, T. Bryś¹, W. Geerts¹, F.-J. Hambsch¹, Z. Kis², T. Martinez⁴, A. Oberstedt³, L. Szentmiklosi² and M. Vidali¹

¹ European Commission, DG Joint Research Centre IRMM, Retieseweg 111, 2440 Geel, Belgium
² Centre for Energy Research, Hungarian Academy of Sciences, 1121 Budapest, Hungary
³ Fundamental Fysik, Chalmers Tekniska Högskola, 41296 Göteborg, Sweden
⁴ CIEMAT, 28040 Madrid, Spain

^a e-mail: stephan.oberstedt@ec.europa.eu

Published online: 13 December 2013

Abstract

We present new spectral data of prompt γ-ray emission from the spontaneous fission of ²⁵²Cf. This work was performed in direct response to an OECD/NEA high priority data request. We discuss the impact of our new data on evaluated nuclear data tables not only for this nuclide, but also for ²³⁸U and ²⁴¹Pu, which are always produced in a reactor. Furthermore, we will show results from our investigation of prompt γ-ray emission from the reaction ²³⁵ U(n_th, f), measured in at the Centre for Energy Research of the Hungarian Academy of Sciences in Budapest, Hungary. Spectral data obtained with three different detectors are consistent and led to an uncertainty on total energy and multiplicity considerably smaller than requested by the OECD/NEA.

© Owned by the authors, published by EDP Sciences, 2013

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