Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al.

J. Balibrea-Correa; E. Mendoza; D. Cano-Ott; E. González; R. Capote; M. Krtička; S. Altstadt; J. Andrzejewski; L. Audouin; V. Bécares; M. Barbagallo; F. Bečvář; F. Belloni; E. Berthoumieux; J. Billowes; V. Boccone; D. Bosnar; M. Brugger; M. Calviani; F. Calviño; C. Carrapiço; F. Cerutti; E. Chiaveri; M. Chin; N. Colonna; G. Cortés; M. A. Cortés-Giraldo; M. Diakaki; C. Domingo-Pardo; R. Dressler; I. Durán; C. Eleftheriadis; A. Ferrari; K. Fraval; V. Furman; K. Göbel; M. B. Gómez-Hornillos; S. Ganesan; A. R. García; G. Giubrone; I. F. Gonçalves; A. Goverdovski; E. Griesmayer; C. Guerrero; F. Gunsing; T. Heftrich; A. Hernández-Prieto; J. Heyse; D. G. Jenkins; E. Jericha; F. Käppeler; Y. Kadi; D. Karadimos; T. Katabuchi; V. Ketlerov; V. Khryachkov; N. Kivel; P. Koehler; M. Kokkoris; J. Kroll; C. Lampoudis; C. Langer; E. Leal-Cidoncha; C. Lederer; H. Leeb; L. S. Leong; J. Lerendegui-Marco; R. Losito; A. Mallick; A. Manousos; J. Marganiec; T. Martínez; C. Massimi; P. Mastinu; M. Mastromarco; A. Mengoni; P. M. Milazzo; F. Mingrone; M. Mirea; W. Mondelaers; C. Paradela; A. Pavlik; J. Perkowski; A. J.M. Plompen; J. Praena; J. M. Quesada; T. Rauscher; R. Reifarth; A. Riego-Perez; M. Robles; C. Rubbia; J. A. Ryan; M. Sabaté-Gilarte; R. Sarmento; A. Saxena; P. Schillebeeckx; S. Schmidt; D. Schumann; P. Sedyshev; G. Tagliente; J. L. Tain; A. Tarifeño-Saldivia; D. Tarrío; L. Tassan-Got; A. Tsinganis; S. Valenta; G. Vannini; V. Variale; P. Vaz; A. Ventura; M. J. Vermeulen; V. Vlachoudis; R. Vlastou; A. Wallner; T. Ware; M. Weigand; C. Weiss; T. Wright; P. Žugec

doi:10.1103/PhysRevC.102.044615

Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al.

J. Balibrea-Correa, E. Mendoza^*, D. Cano-Ott, E. González, R. Capote, M. Krtička, S. Altstadt, J. Andrzejewski, L. Audouin, V. Bécares, M. Barbagallo, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, M. Calviani, F. CalviñoC. Carrapiço, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortés, M. A. Cortés-Giraldo, M. Diakaki, C. Domingo-Pardo, R. Dressler, I. Durán, C. Eleftheriadis, A. Ferrari, K. Fraval, V. Furman, K. Göbel, M. B. Gómez-Hornillos, S. Ganesan, A. R. García, G. Giubrone, I. F. Gonçalves, A. Goverdovski, E. Griesmayer, C. Guerrero, F. Gunsing, T. Heftrich, A. Hernández-Prieto, J. Heyse, D. G. Jenkins, E. Jericha, F. Käppeler, Y. Kadi, D. Karadimos, T. Katabuchi, V. Ketlerov, V. Khryachkov, N. Kivel, P. Koehler, M. Kokkoris, J. Kroll, C. Lampoudis, C. Langer, E. Leal-Cidoncha, C. Lederer, H. Leeb, L. S. Leong, J. Lerendegui-Marco, R. Losito, A. Mallick, A. Manousos, J. Marganiec, T. Martínez, C. Massimi, P. Mastinu, M. Mastromarco, A. Mengoni, P. M. Milazzo, F. Mingrone, M. Mirea, W. Mondelaers, C. Paradela, A. Pavlik, J. Perkowski, A. J.M. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifarth, A. Riego-Perez, M. Robles, C. Rubbia, J. A. Ryan, M. Sabaté-Gilarte, R. Sarmento, A. Saxena, P. Schillebeeckx, S. Schmidt, D. Schumann, P. Sedyshev, G. Tagliente, J. L. Tain, A. Tarifeño-Saldivia, D. Tarrío, L. Tassan-Got, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, M. J. Vermeulen, V. Vlachoudis, R. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, T. Wright, P. Žugec

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Abstract

We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the Li6(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the U235(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of U235 performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

Original language	English
Article number	044615
Journal	Physical Review C
Volume	102
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevC.102.044615
Publication status	Published - 20 Oct 2020

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10.1103/PhysRevC.102.044615

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Balibrea-Correa, J., Mendoza, E., Cano-Ott, D., González, E., Capote, R., Krtička, M., Altstadt, S., Andrzejewski, J., Audouin, L., Bécares, V., Barbagallo, M., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calviani, M., ... Žugec, P. (2020). Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al. Physical Review C, 102(4), Article 044615. https://doi.org/10.1103/PhysRevC.102.044615

@article{c7d223f02a26464e8d093a52e8678d5a,

title = "Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al.",

abstract = "We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the Li6(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the U235(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of U235 performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.",

author = "J. Balibrea-Correa and E. Mendoza and D. Cano-Ott and E. Gonz{\'a}lez and R. Capote and M. Krti{\v c}ka and S. Altstadt and J. Andrzejewski and L. Audouin and V. B{\'e}cares and M. Barbagallo and F. Be{\v c}v{\'a}{\v r} and F. Belloni and E. Berthoumieux and J. Billowes and V. Boccone and D. Bosnar and M. Brugger and M. Calviani and F. Calvi{\~n}o and C. Carrapi{\c c}o and F. Cerutti and E. Chiaveri and M. Chin and N. Colonna and G. Cort{\'e}s and Cort{\'e}s-Giraldo, {M. A.} and M. Diakaki and C. Domingo-Pardo and R. Dressler and I. Dur{\'a}n and C. Eleftheriadis and A. Ferrari and K. Fraval and V. Furman and K. G{\"o}bel and G{\'o}mez-Hornillos, {M. B.} and S. Ganesan and Garc{\'i}a, {A. R.} and G. Giubrone and Gon{\c c}alves, {I. F.} and A. Goverdovski and E. Griesmayer and C. Guerrero and F. Gunsing and T. Heftrich and A. Hern{\'a}ndez-Prieto and J. Heyse and Jenkins, {D. G.} and E. Jericha and F. K{\"a}ppeler and Y. Kadi and D. Karadimos and T. Katabuchi and V. Ketlerov and V. Khryachkov and N. Kivel and P. Koehler and M. Kokkoris and J. Kroll and C. Lampoudis and C. Langer and E. Leal-Cidoncha and C. Lederer and H. Leeb and Leong, {L. S.} and J. Lerendegui-Marco and R. Losito and A. Mallick and A. Manousos and J. Marganiec and T. Mart{\'i}nez and C. Massimi and P. Mastinu and M. Mastromarco and A. Mengoni and Milazzo, {P. M.} and F. Mingrone and M. Mirea and W. Mondelaers and C. Paradela and A. Pavlik and J. Perkowski and Plompen, {A. J.M.} and J. Praena and Quesada, {J. M.} and T. Rauscher and R. Reifarth and A. Riego-Perez and M. Robles and C. Rubbia and Ryan, {J. A.} and M. Sabat{\'e}-Gilarte and R. Sarmento and A. Saxena and P. Schillebeeckx and S. Schmidt and D. Schumann and P. Sedyshev and G. Tagliente and Tain, {J. L.} and A. Tarife{\~n}o-Saldivia and D. Tarr{\'i}o and L. Tassan-Got and A. Tsinganis and S. Valenta and G. Vannini and V. Variale and P. Vaz and A. Ventura and Vermeulen, {M. J.} and V. Vlachoudis and R. Vlastou and A. Wallner and T. Ware and M. Weigand and C. Weiss and T. Wright and P. {\v Z}ugec",

note = "Publisher Copyright: {\textcopyright} 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.",

year = "2020",

month = oct,

day = "20",

doi = "10.1103/PhysRevC.102.044615",

language = "English",

volume = "102",

journal = "Physical Review C",

issn = "2469-9985",

publisher = "American Physical Society",

number = "4",

}

Balibrea-Correa, J, Mendoza, E, Cano-Ott, D, González, E, Capote, R, Krtička, M, Altstadt, S, Andrzejewski, J, Audouin, L, Bécares, V, Barbagallo, M, Bečvář, F, Belloni, F, Berthoumieux, E, Billowes, J, Boccone, V, Bosnar, D, Brugger, M, Calviani, M, Calviño, F, Carrapiço, C, Cerutti, F, Chiaveri, E, Chin, M, Colonna, N, Cortés, G, Cortés-Giraldo, MA, Diakaki, M, Domingo-Pardo, C, Dressler, R, Durán, I, Eleftheriadis, C, Ferrari, A, Fraval, K, Furman, V, Göbel, K, Gómez-Hornillos, MB, Ganesan, S, García, AR, Giubrone, G, Gonçalves, IF, Goverdovski, A, Griesmayer, E, Guerrero, C, Gunsing, F, Heftrich, T, Hernández-Prieto, A, Heyse, J, Jenkins, DG, Jericha, E, Käppeler, F, Kadi, Y, Karadimos, D, Katabuchi, T, Ketlerov, V, Khryachkov, V, Kivel, N, Koehler, P, Kokkoris, M, Kroll, J, Lampoudis, C, Langer, C, Leal-Cidoncha, E, Lederer, C, Leeb, H, Leong, LS, Lerendegui-Marco, J, Losito, R, Mallick, A, Manousos, A, Marganiec, J, Martínez, T, Massimi, C, Mastinu, P, Mastromarco, M, Mengoni, A, Milazzo, PM, Mingrone, F, Mirea, M, Mondelaers, W, Paradela, C, Pavlik, A, Perkowski, J, Plompen, AJM, Praena, J, Quesada, JM, Rauscher, T, Reifarth, R, Riego-Perez, A, Robles, M, Rubbia, C, Ryan, JA, Sabaté-Gilarte, M, Sarmento, R, Saxena, A, Schillebeeckx, P, Schmidt, S, Schumann, D, Sedyshev, P, Tagliente, G, Tain, JL, Tarifeño-Saldivia, A, Tarrío, D, Tassan-Got, L, Tsinganis, A, Valenta, S, Vannini, G, Variale, V, Vaz, P, Ventura, A, Vermeulen, MJ, Vlachoudis, V, Vlastou, R, Wallner, A, Ware, T, Weigand, M, Weiss, C, Wright, T & Žugec, P 2020, 'Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al.', Physical Review C, vol. 102, no. 4, 044615. https://doi.org/10.1103/PhysRevC.102.044615

TY - JOUR

T1 - Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al.

AU - Balibrea-Correa, J.

AU - Mendoza, E.

AU - Cano-Ott, D.

AU - González, E.

AU - Capote, R.

AU - Krtička, M.

AU - Altstadt, S.

AU - Andrzejewski, J.

AU - Audouin, L.

AU - Bécares, V.

AU - Barbagallo, M.

AU - Bečvář, F.

AU - Belloni, F.

AU - Berthoumieux, E.

AU - Billowes, J.

AU - Boccone, V.

AU - Bosnar, D.

AU - Brugger, M.

AU - Calviani, M.

AU - Calviño, F.

AU - Carrapiço, C.

AU - Cerutti, F.

AU - Chiaveri, E.

AU - Chin, M.

AU - Colonna, N.

AU - Cortés, G.

AU - Cortés-Giraldo, M. A.

AU - Diakaki, M.

AU - Domingo-Pardo, C.

AU - Dressler, R.

AU - Durán, I.

AU - Eleftheriadis, C.

AU - Ferrari, A.

AU - Fraval, K.

AU - Furman, V.

AU - Göbel, K.

AU - Gómez-Hornillos, M. B.

AU - Ganesan, S.

AU - García, A. R.

AU - Giubrone, G.

AU - Gonçalves, I. F.

AU - Goverdovski, A.

AU - Griesmayer, E.

AU - Guerrero, C.

AU - Gunsing, F.

AU - Heftrich, T.

AU - Hernández-Prieto, A.

AU - Heyse, J.

AU - Jenkins, D. G.

AU - Jericha, E.

AU - Käppeler, F.

AU - Kadi, Y.

AU - Karadimos, D.

AU - Katabuchi, T.

AU - Ketlerov, V.

AU - Khryachkov, V.

AU - Kivel, N.

AU - Koehler, P.

AU - Kokkoris, M.

AU - Kroll, J.

AU - Lampoudis, C.

AU - Langer, C.

AU - Leal-Cidoncha, E.

AU - Lederer, C.

AU - Leeb, H.

AU - Leong, L. S.

AU - Lerendegui-Marco, J.

AU - Losito, R.

AU - Mallick, A.

AU - Manousos, A.

AU - Marganiec, J.

AU - Martínez, T.

AU - Massimi, C.

AU - Mastinu, P.

AU - Mastromarco, M.

AU - Mengoni, A.

AU - Milazzo, P. M.

AU - Mingrone, F.

AU - Mirea, M.

AU - Mondelaers, W.

AU - Paradela, C.

AU - Pavlik, A.

AU - Perkowski, J.

AU - Plompen, A. J.M.

AU - Praena, J.

AU - Quesada, J. M.

AU - Rauscher, T.

AU - Reifarth, R.

AU - Riego-Perez, A.

AU - Robles, M.

AU - Rubbia, C.

AU - Ryan, J. A.

AU - Sabaté-Gilarte, M.

AU - Sarmento, R.

AU - Saxena, A.

AU - Schillebeeckx, P.

AU - Schmidt, S.

AU - Schumann, D.

AU - Sedyshev, P.

AU - Tagliente, G.

AU - Tain, J. L.

AU - Tarifeño-Saldivia, A.

AU - Tarrío, D.

AU - Tassan-Got, L.

AU - Tsinganis, A.

AU - Valenta, S.

AU - Vannini, G.

AU - Variale, V.

AU - Vaz, P.

AU - Ventura, A.

AU - Vermeulen, M. J.

AU - Vlachoudis, V.

AU - Vlastou, R.

AU - Wallner, A.

AU - Ware, T.

AU - Weigand, M.

AU - Weiss, C.

AU - Wright, T.

AU - Žugec, P.

N1 - Publisher Copyright: © 2020 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

PY - 2020/10/20

Y1 - 2020/10/20

N2 - We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the Li6(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the U235(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of U235 performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

AB - We measured the neutron capture-to-fission cross-section ratio (α ratio) and the capture cross section of U235 between 0.2 and 200 eV at the n_TOF facility at CERN. The simultaneous measurement of neutron-induced capture and fission rates was performed by means of the n_TOF BaF2 Total Absorption Calorimeter (TAC), used for detection of γ rays, in combination with a set of micromegas detectors used as fission tagging detectors. The energy dependence of the capture cross section was obtained with help of the Li6(n,t) standard reaction determining the n_TOF neutron fluence; the well-known integral of the U235(n,f) cross section between 7.8 and 11 eV was then used for its absolute normalization. The α ratio, obtained with slightly higher statistical fluctuations, was determined directly, without need for any reference cross section. To perform the analysis of this measurement we developed a new methodology to correct the experimentally observed effect that the probabilities of detecting a fission reaction in the TAC and the micromegas detectors are not independent. The results of this work have been used in a new evaluation of U235 performed within the scope of the Collaborative International Evaluated Library Organisation (CIELO) Project, and are consistent with the ENDF/B-VIII.0 and JEFF-3.3 capture cross sections below 4 eV and above 100 eV. However, the measured capture cross section is on average 10% larger between 4 and 100 eV.

UR - http://www.scopus.com/inward/record.url?scp=85095131388&partnerID=8YFLogxK

U2 - 10.1103/PhysRevC.102.044615

DO - 10.1103/PhysRevC.102.044615

M3 - Article

SN - 2469-9985

VL - 102

JO - Physical Review C

JF - Physical Review C

IS - 4

M1 - 044615

ER -

Measurement of the α ratio and (n,γ) cross section of U 235 from 0.2 to 200 eV at n_TOF MEASUREMENT of the α RATIO and ... J. BALIBREA-CORREA et al.

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