Measurement of the prompt fission γ -rays from slow neutron-induced fission of ^235 U with STEFF
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
The European Physical Journal A（2024）
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摘要
The average energy and multiplicity of prompt γ -rays from slow neutron-induced fission of ^235 U 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 E̅_γ of 1.71(5) MeV and multiplicity ν̅_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 E̅_γ and smaller ν̅_γ than other recent measurements, however the product of the two is in agreement within quoted uncertainties.
