High-accuracy determination of theU238/U235fission cross section ratio up to≈1GeV at n_TOF at CERN

C. Paradela,Marco Calviani,Diego Tarrío,E. Leal-Cidoncha,L. S. Leong,L. Tassan-Got,C. Le Naour,I. Duran,N. Colonna,L. Audouin,M. Mastromarco,Sergio Lo Meo,A. Ventura,G. Aerts,S. Altstadt,H. Álvarez,F. Álvarez-Velarde,S. Andriamonje,J. Andrzejewski,G. Badurek,M. Barbagallo,P. Baumann,V. Bécares,František Bečvář,F. Belloni,B. Berthier,E. Berthoumieux,J. Billowes,V. Boccone,D. Bosnar,M. Brugger,Francisco Calvino,D. Cano-Ott,R. Capote,C. Carrapiço,P. Cennini,F. Cerutti,E. Chiaveri,M. Chin,Guillem Cortes,M. A. Cortés-Giraldo,Luigi Cosentino,A. Couture,J. Cox,S. David,M. Diakaki,Iris Dillmann,César Domingo-Pardo,R. Dressler,W. Dridi,C. Eleftheriadis,M. Embid-Segura,L. Ferrant,A. Ferrari,Paolo Finocchiaro,K. Fraval,K. Fujii,W. Furman,S. Ganesan,A. R. García,G. Giubrone,M. B. Gómez-Hornillos,I. F. Gonçalves,Enrique M. Gonzalez-Romero,A. Goverdovski,Fabiana Gramegna,E. Griesmayer,Carlos Guerrero,F. Gunsing,P. Gurusamy,R. Haight,M. Heil,S. Heinitz,M. Igashira,S. Isaev,D. G. Jenkins,Erwin Jericha,Y. Kadi,F. Käppeler,D. Karadimos,Dimitrios Karamanis,M. Kerveno,V. Ketlerov,N. Kivel,M. Kokkoris,V. Konovalov,Milan Krtička,Jiri Kroll,C. Lampoudis,C. Langer,C. Lederer,H. Leeb,Roberto Losito,M. Lozano,A. Manousos,J. Marganiec,T. Martínez,S. Marrone,Cristian Massimi,P. Mastinu,E. Mendoza,Alberto Mengoni,P. M. Milazzo,F. Mingrone,Mihail Mirea,W. Mondelaers,C. Moreau,M. Mosconi,A. Musumarra,S. O'Brien,J. Pancin,N. Patronis,Andreas Pavlik,P. Pavlopoulos,Jarosław Perkowski,L. Perrot,M. T. Pigni,R. Plag,A. Plompen,L. Plukis,A. Poch,Carme Pretel,J. Praena,J. Quesada,Thomas Rauscher,Rene Reifarth,Albert Riego,F. Roman,G. Rudolf,C. Rubbia,P. Rullhusen,J. Salgado,C. Santos,L. Sarchiapone,Raul Sarmento,A. Saxena,P. Schillebeeckx,S. Schmidt,D. Schumann,C. Stephan,G. Tagliente,Jose L. Tain,L. Tavora,R. Terlizzi,Andrea Tsinganis,S. Valenta,G. Vannini,V. Variale,Pedro Vaz,Roberto Versaci,M. J. Vermeulen,D. Villamarin,M. C. Vincente,V. Vlachoudis,R. Vlastou,F. Voss,Anton Wallner,S. Walter,T. Ware,M. Weigand,C. Weiß,M. Wiesher,K. Wisshak,T. Wright,P. Žugec,n_TOF Collaboration; C. Paradela; Marco Calviani; Diego Tarrío; E. Leal-Cidoncha; L. S. Leong; L. Tassan-Got; C. Le Naour; I. Duran; N. Colonna; L. Audouin; M. Mastromarco; Sergio Lo Meo; A. Ventura; G. Aerts; S. Altstadt; H. Álvarez; F. Álvarez-Velarde; S. Andriamonje; J. Andrzejewski; G. Badurek; M. Barbagallo; P. Baumann; V. Bécares; František Bečvář; F. Belloni; B. Berthier; E. Berthoumieux; J. Billowes; V. Boccone; D. Bosnar; M. Brugger; Francisco Calvino; D. Cano-Ott; R. Capote; C. Carrapiço; P. Cennini; F. Cerutti; E. Chiaveri; M. Chin; Guillem Cortes; M. A. Cortés-Giraldo; Luigi Cosentino; A. Couture; J. Cox; S. David; M. Diakaki; Iris Dillmann; César Domingo-Pardo; R. Dressler; W. Dridi; C. Eleftheriadis; M. Embid-Segura; L. Ferrant; A. Ferrari; Paolo Finocchiaro; K. Fraval; K. Fujii; W. Furman; S. Ganesan; A. R. García; G. Giubrone; M. B. Gómez-Hornillos; I. F. Gonçalves; Enrique M. Gonzalez-Romero; A. Goverdovski; Fabiana Gramegna; E. Griesmayer; Carlos Guerrero; F. Gunsing; P. Gurusamy; R. Haight; M. Heil; S. Heinitz; M. Igashira; S. Isaev; D. G. Jenkins; Erwin Jericha; Y. Kadi; F. Käppeler; D. Karadimos; Dimitrios Karamanis; M. Kerveno; V. Ketlerov; N. Kivel; M. Kokkoris; V. Konovalov; Milan Krtička; Jiri Kroll; C. Lampoudis; C. Langer; C. Lederer; H. Leeb; Roberto Losito; M. Lozano; A. Manousos; J. Marganiec; T. Martínez; S. Marrone; Cristian Massimi; P. Mastinu; E. Mendoza; Alberto Mengoni; P. M. Milazzo; F. Mingrone; Mihail Mirea; W. Mondelaers; C. Moreau; M. Mosconi; A. Musumarra; S. O'Brien; J. Pancin; N. Patronis; Andreas Pavlik; P. Pavlopoulos; Jarosław Perkowski; L. Perrot; M. T. Pigni; R. Plag; A. Plompen; L. Plukis; A. Poch; Carme Pretel; J. Praena; J. Quesada; Thomas Rauscher; Rene Reifarth; Albert Riego; F. Roman; G. Rudolf; C. Rubbia; P. Rullhusen; J. Salgado; C. Santos; L. Sarchiapone; Raul Sarmento; A. Saxena; P. Schillebeeckx; S. Schmidt; D. Schumann; C. Stephan; G. Tagliente; Jose L. Tain; L. Tavora; R. Terlizzi; Andrea Tsinganis; S. Valenta; G. Vannini; V. Variale; Pedro Vaz; Roberto Versaci; M. J. Vermeulen; D. Villamarin; M. C. Vincente; V. Vlachoudis; R. Vlastou; F. Voss; Anton Wallner; S. Walter; T. Ware; M. Weigand; C. Weiß; M. Wiesher; K. Wisshak; T. Wright; P. Žugec; n_TOF Collaboration

High-accuracy determination of theU238/U235fission cross section ratio up to≈1GeV at n_TOF at CERN

C. Paradela,Marco Calviani,Diego Tarrío,E. Leal-Cidoncha,L. S. Leong,L. Tassan-Got,C. Le Naour,I. Duran,N. Colonna,L. Audouin,M. Mastromarco,Sergio Lo Meo,A. Ventura,G. Aerts,S. Altstadt,H. Álvarez,F. Álvarez-Velarde,S. Andriamonje,J. Andrzejewski,G. Badurek,M. Barbagallo,P. Baumann,V. Bécares,František Bečvář,F. Belloni,B. Berthier,E. Berthoumieux,J. Billowes,V. Boccone,D. Bosnar,M. Brugger,Francisco Calvino,D. Cano-Ott,R. Capote,C. Carrapiço,P. Cennini,F. Cerutti,E. Chiaveri,M. Chin,Guillem Cortes,M. A. Cortés-Giraldo,Luigi Cosentino,A. Couture,J. Cox,S. David,M. Diakaki,Iris Dillmann,César Domingo-Pardo,R. Dressler,W. Dridi,C. Eleftheriadis,M. Embid-Segura,L. Ferrant,A. Ferrari,Paolo Finocchiaro,K. Fraval,K. Fujii,W. Furman,S. Ganesan,A. R. García,G. Giubrone,M. B. Gómez-Hornillos,I. F. Gonçalves,Enrique M. Gonzalez-Romero,A. Goverdovski,Fabiana Gramegna,E. Griesmayer,Carlos Guerrero,F. Gunsing,P. Gurusamy,R. Haight,M. Heil,S. Heinitz,M. Igashira,S. Isaev,D. G. Jenkins,Erwin Jericha,Y. Kadi,F. Käppeler,D. Karadimos,Dimitrios Karamanis,M. Kerveno,V. Ketlerov,N. Kivel,M. Kokkoris,V. Konovalov,Milan Krtička,Jiri Kroll,C. Lampoudis,C. Langer,C. Lederer,H. Leeb,Roberto Losito,M. Lozano,A. Manousos,J. Marganiec,T. Martínez,S. Marrone,Cristian Massimi,P. Mastinu,E. Mendoza,Alberto Mengoni,P. M. Milazzo,F. Mingrone,Mihail Mirea,W. Mondelaers,C. Moreau,M. Mosconi,A. Musumarra,S. O'Brien,J. Pancin,N. Patronis,Andreas Pavlik,P. Pavlopoulos,Jarosław Perkowski,L. Perrot,M. T. Pigni,R. Plag,A. Plompen,L. Plukis,A. Poch,Carme Pretel,J. Praena,J. Quesada,Thomas Rauscher,Rene Reifarth,Albert Riego,F. Roman,G. Rudolf,C. Rubbia,P. Rullhusen,J. Salgado,C. Santos,L. Sarchiapone,Raul Sarmento,A. Saxena,P. Schillebeeckx,S. Schmidt,D. Schumann,C. Stephan,G. Tagliente,Jose L. Tain,L. Tavora,R. Terlizzi,Andrea Tsinganis,S. Valenta,G. Vannini,V. Variale,Pedro Vaz,Roberto Versaci,M. J. Vermeulen,D. Villamarin,M. C. Vincente,V. Vlachoudis,R. Vlastou,F. Voss,Anton Wallner,S. Walter,T. Ware,M. Weigand,C. Weiß,M. Wiesher,K. Wisshak,T. Wright,P. Žugec,n_TOF Collaboration;C. Paradela;Marco Calviani;Diego Tarrío;E. Leal-Cidoncha;L. S. Leong;L. Tassan-Got;C. Le Naour;I. Duran;N. Colonna;L. Audouin;M. Mastromarco;Sergio Lo Meo;A. Ventura;G. Aerts;S. Altstadt;H. Álvarez;F. Álvarez-Velarde;S. Andriamonje;J. Andrzejewski;G. Badurek;M. Barbagallo;P. Baumann;V. Bécares;František Bečvář;F. Belloni;B. Berthier;E. Berthoumieux;J. Billowes;V. Boccone;D. Bosnar;M. Brugger;Francisco Calvino;D. Cano-Ott;R. Capote;C. Carrapiço;P. Cennini;F. Cerutti;E. Chiaveri;M. Chin;Guillem Cortes;M. A. Cortés-Giraldo;Luigi Cosentino;A. Couture;J. Cox;S. David;M. Diakaki;Iris Dillmann;César Domingo-Pardo;R. Dressler;W. Dridi;C. Eleftheriadis;M. Embid-Segura;L. Ferrant;A. Ferrari;Paolo Finocchiaro;K. Fraval;K. Fujii;W. Furman;S. Ganesan;A. R. García;G. Giubrone;M. B. Gómez-Hornillos;I. F. Gonçalves;Enrique M. Gonzalez-Romero;A. Goverdovski;Fabiana Gramegna;E. Griesmayer;Carlos Guerrero;F. Gunsing;P. Gurusamy;R. Haight;M. Heil;S. Heinitz;M. Igashira;S. Isaev;D. G. Jenkins;Erwin Jericha;Y. Kadi;F. Käppeler;D. Karadimos;Dimitrios Karamanis;M. Kerveno;V. Ketlerov;N. Kivel;M. Kokkoris;V. Konovalov;Milan Krtička;Jiri Kroll;C. Lampoudis;C. Langer;C. Lederer;H. Leeb;Roberto Losito;M. Lozano;A. Manousos;J. Marganiec;T. Martínez;S. Marrone;Cristian Massimi;P. Mastinu;E. Mendoza;Alberto Mengoni;P. M. Milazzo;F. Mingrone;Mihail Mirea;W. Mondelaers;C. Moreau;M. Mosconi;A. Musumarra;S. O'Brien;J. Pancin;N. Patronis;Andreas Pavlik;P. Pavlopoulos;Jarosław Perkowski;L. Perrot;M. T. Pigni;R. Plag;A. Plompen;L. Plukis;A. Poch;Carme Pretel;J. Praena;J. Quesada;Thomas Rauscher;Rene Reifarth;Albert Riego;F. Roman;G. Rudolf;C. Rubbia;P. Rullhusen;J. Salgado;C. Santos;L. Sarchiapone;Raul Sarmento;A. Saxena;P. Schillebeeckx;S. Schmidt;D. Schumann;C. Stephan;G. Tagliente;Jose L. Tain;L. Tavora;R. Terlizzi;Andrea Tsinganis;S. Valenta;G. Vannini;V. Variale;Pedro Vaz;Roberto Versaci;M. J. Vermeulen;D. Villamarin;M. C. Vincente;V. Vlachoudis;R. Vlastou;F. Voss;Anton Wallner;S. Walter;T. Ware;M. Weigand;C. Weiß;M. Wiesher;K. Wisshak;T. Wright;P. Žugec;n_TOF Collaboration;

physical review c 2015 Vol. 91 pp. 024602-

177

collaboration2015physicalhigh-accuracy

Abstract

The U238 to U235 fission cross section ratio has been determined at n_TOF up to ≈1 GeV, with two different detection systems, in different geometrical configurations. A total of four datasets has been collected and compared. They are all consistent to each other within the relative systematic uncertainty of 3–4%. The data collected at n_TOF have been suitably combined to yield a unique fission cross section ratio as a function of neutron energy. The result confirms current evaluations up to 200 MeV. Good agreement is also observed with theoretical calculations based on the INCL++/Gemini++ combination up to the highest measured energy. The n_TOF results may help solve a long-standing discrepancy between the two most important experimental datasets available so far above 20 MeV, while extending the neutron energy range for the first time up to ≈1 GeV.

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function gev mev n_tof neutron energy fission cross cross section ratio

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10.1103/physrevc.91.024602

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