A compact fission detector for fission-tagging neutron capture experiments with radioactive fissile isotopes

M. Bacak,M. Aïche,G. Bélier,E. Berthoumieux,M. Diakaki,E. Dupont,F. Gunsing,J. Heyse,S. Kopecky, B. Laurent,H. Leeb,L. Mathieu,A. Moens,S. Richter,P. Schillebeeckx,O. Serot,G. Sibbens,J. Taieb,D. Vanleeuw,V. Vlachoudis,O. Aberle,S. Amaducci,J. Andrzejewski,L. Audouin,J. Balibrea,M. Barbagallo,F. Bečvář,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,C. Domingo-Pardo,R. Dressler,I. Durán,B. Fernández-Domínguez,A. Ferrari, P. Ferreira,P. Finocchiaro,V. Furman, K. Göbel,A.R. García,A. Gawlik,S. Gilardoni,T. Glodariu,I.F. Gonçalves,E. González-Romero,E. Griesmayer, C. Guerrero,H. Harada,S. Heinitz, D.G. Jenkins,E. Jericha,F. Käppeler,Y. Kadi,A. Kalamara,P. Kavrigin,A. Kimura,N. Kivel, I. Knapova,M. Kokkoris,M. Krtička,D. Kurtulgil,E. Leal-Cidoncha,C. Lederer,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,J.A. Ryan,M. Sabaté-Gilarte,A. Saxena,D. Schumann,P. Sedyshev,A.G. Smith,N.V. Sosnin,A. Stamatopoulos,G. Tagliente,J.L. Tain,A. Tarifeño-Saldivia,L. Tassan-Got,S. Valenta,G. Vannini,V. Variale,P. Vaz,A. Ventura,R. Vlastou,A. Wallner,S. Warren,C. Weiss,P.J. Woods,T. Wright,P. Žugec

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2020）

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摘要

In the measurement of neutron capture cross-sections of fissile isotopes, the fission channel is a source of background which can be removed efficiently using the so-called fission-tagging or fission-veto technique. For this purpose a new compact and fast fission chamber has been developed. The design criteria and technical description of the chamber are given within the context of a measurement of the 233U(n, γ) cross-section at the n_TOF facility at CERN, where it was coupled to the n_TOF Total Absorption Calorimeter. For this measurement the fission detector was optimized for time resolution, minimization of material in the neutron beam and for alpha-fission discrimination. The performance of the fission chamber and its application as a fission tagging detector are discussed.

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关键词

Fission detector,233U,n_TOF,Time-of-flight

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