Measurement of the prompt fission γ-rays from slow neutron-induced fission of ²³⁵U with STEFF

Author(s)

T. Wright, A. G. Smith, N. V. Sosnin, S. A. Bennett, P. J. Davies, A. V. Popescu, J. A. Ryan, A. Sekhar, S. Warren, O. Aberle, S. Amaducci, J. Andrzejewski, L. Audouin, M. Bacak, J. Balibrea, M. Barbagallo, F. Bečvář, E. Berthoumieux, J. Billowes, D. Bosnar, A. Brown, M. Caamaño, F. Calviño, M. Calviani, D. Cano-Ott, R. Cardella, A. Casanovas, F. Cerutti, Y. H. Chen, E. Chiaveri, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, L. Cosentino, L. A. Damone, M. Diakaki, C. Domingo-Pardo, R. Dressler, E. Dupont, I. Durán, B. Fernández-Domínguez, A. Ferrari, P. Ferreira, P. Finocchiaro, V. Furman, K. Göbel, A. R. García, A. Gawlik-Ramięga, S. Gilardoni, T. Glodariu, I. F. Gonçalves, E. González-Romero, E. Griesmayer, C. Guerrero, F. Gunsing, H. Harada, S. Heinitz, J. Heyse, D. G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, A. Kalamara, P. Kavrigin, A. Kimura, N. Kivel, M. Kokkoris, M. Krtička, D. Kurtulgil, E. Leal-Cidoncha, C. Lederer-Woods, H. Leeb, J. Lerendegui-Marco, S. Lo Meo, S. J. Lonsdale, D. Macina, A. Manna, J. Marganiec, T. Martínez, A. Masi, C. Massimi, P. Mastinu, M. Mastromarco, E. A. Maugeri, A. Mazzone, E. Mendoza, A. Mengoni, P. M. Milazzo, F. Mingrone, A. Musumarra, A. Negret, R. Nolte, A. Oprea, N. Patronis, A. Pavlik, J. Perkowski, I. Porras, J. Praena, J. M. Quesada, D. Radeck, T. Rauscher, R. Reifarth, C. Rubbia, M. Sabaté-Gilarte, A. Saxena, P. Schillebeeckx, D. Schumann, P. Sedyshev, A. Stamatopoulos, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, L. Tassan-Got, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, V. Vlachoudis, R. Vlastou, A. Wallner, C. Weiss, P. J. Woods, P. Žugec

Abstract

The average energy and multiplicity of prompt γ-rays from slow neutron-induced fission of ²³⁵U have been measured using the STEFF spectrometer at the neutron time-of-flight facility n_TOF. The individual responses from 11 NaI scintillators were corrected for multiple γ-ray interactions, prompt fission neutrons and background counts before being deconvolved to estimate the emitted spectrum of prompt fission γ-rays. The results give an average γ-ray energy E¯_γ of 1.71(5) MeV and multiplicity ν¯_γ of 2.66(18) considering γ-rays emitted within the energy range 0.8–6.8 MeV. The n_TOF data has a slightly larger E¯_γ and smaller ν¯_γ than other recent measurements, however the product of the two is in agreement within quoted uncertainties.

Organisation(s)

Isotope Physics

External organisation(s)

University of Manchester, University of Edinburgh, University of York, Institut Laue-Langevin (ILL), Technische Universität München, European Organization for Nuclear Research (CERN), Istituto Nazionale di Fisica Nucleare (INFN), Roma, University of Bologna, University of Lodz, IPHC, Technische Universität Wien, Université Paris Saclay, Centro de Investigaciones Energeticas Medioambientales y Tecnológica, Charles University Prague, University of Zagreb, Universidade de Santiago de Compostela (USC), Universitat Politècnica de Catalunya, Universidad de Sevilla, Università degli Studi di Bari Aldo Moro, Universitat de València, Paul Scherrer Institute, EURATOM Association, Johann Wolfgang Goethe-Universität Frankfurt am Main, Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Japan Atomic Energy Agency, European Commission, Karlsruher Institut für Technologie, National Technical University of Athens (NTUA), Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Istituto Nazionale di Fisica Nucleare (INFN), Legnaro, Institute of Genetics and Biophysics "Adriano Buzzati-Traverso", CNR, Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste, INFN Laboratori Nazionali del Sud, Università degli Studi di Catania, Physikalisch-Technische Bundesanstalt, University of Ioannina, Universidad de Granada, Universität Basel, University of Hertfordshire, Bhabha Atomic Research Center, Australian National University

Journal

European Physical Journal A

Volume

60

No. of pages

11

ISSN

1434-6001

DOI

https://doi.org/10.1140/epja/s10050-024-01277-8

Publication date

03-2024

Peer reviewed

Yes

Austrian Fields of Science 2012

103014 Nuclear physics

ASJC Scopus subject areas

Nuclear and High Energy Physics

Portal url

https://ucrisportal.univie.ac.at/en/publications/136ad0be-4477-44ae-af1b-cc57eb5aa32c