Angular distribution in the neutron-induced fission of actinides

L. S. Leong; L. Tassan-Got; D. Tarrio; L. Audouin; C. Paradela; I. Duran; C. Le Naour; S. Altstadt; J. Andrzejewsky; M. Barbagallo; V. Becares; F. Bečvář; F. Belloni; E. Berthoumieux; J. Billowes; V. Boccone; D. Bosnar; M. Brugger; F. Calvino; M. Calviani; D. Cano-Ott; C. Carrapico; F. Cerutti; E. Chiaveri; M. Chin; N. Colonna; G. Cortes; M. A. Cortes-Giraldo; M. Diakaki; C. Domingo-Pardo; R. Dressler; N. Dzysiuk; C. Eleftheriadis; A. Ferrari; K. Fraval; S. Ganesan; A. R. Garcia; G. Giubrone; M. B. Gomez-Hornillos; I. F. Goncalves; R. González; E. Griesmayer; C. Guerrero; F. Gunsing; P. Gurusamy; D. G. Jenkins; E. Jericha; E. Kadi; F. Käppeler; D. Karadimos; N. Kivel; P. Koehler; M. Kokkoris; G. Korschinek; J. Kroll; M. Krtička; C. Langer; C. Lederer; H. Leeb; R. Losito; A. Manousos; J. Marganiec; C. Massimi; T. Martinez; P. F. Mastinu; M. Mastromarco; M. Meaze; A. Mengon; E. Mendoza; P. M. Milazzo; T. Mingrone; M. Mirea; W. Mondelaers; A. Pavlik; J. Perkowski; M. Pignatari; A. Plompen; J. Praena; J. M. Quesada; T. Rauscher; R. Reifhart; A. Riego; F. Roman; C. Rubbia; R. Sarmento; P. Schillebeeckx; S. Schmidt; D. Schumann; J. L. Taín; G. Tagliente; A. Tsinganis; S. Valenta; G. Vannini; V. Variale; P. Vaz; A. Ventura; R. Versaci; M. J. Vermeulen; V. Vlachoudis; V. Vlastou; A. Wallner; T. Ware; M. Weigand; C. Weiss; T. Wright; G. Zç

doi:10.1051/epjconf/20136208003

Angular distribution in the neutron-induced fission of actinides

L. S. Leong, L. Tassan-Got, D. Tarrio, L. Audouin, C. Paradela, I. Duran, C. Le Naour, S. Altstadt, J. Andrzejewsky, M. Barbagallo, V. Becares, F. Bečvář, F. Belloni, E. Berthoumieux, J. Billowes, V. Boccone, D. Bosnar, M. Brugger, F. Calvino, M. CalvianiD. Cano-Ott, C. Carrapico, F. Cerutti, E. Chiaveri, M. Chin, N. Colonna, G. Cortes, M. A. Cortes-Giraldo, M. Diakaki, C. Domingo-Pardo, R. Dressler, N. Dzysiuk, C. Eleftheriadis, A. Ferrari, K. Fraval, S. Ganesan, A. R. Garcia, G. Giubrone, M. B. Gomez-Hornillos, I. F. Goncalves, R. González, E. Griesmayer, C. Guerrero, F. Gunsing, P. Gurusamy, D. G. Jenkins, E. Jericha, E. Kadi, F. Käppeler, D. Karadimos, N. Kivel, P. Koehler, M. Kokkoris, G. Korschinek, J. Kroll, M. Krtička, C. Langer, C. Lederer, H. Leeb, R. Losito, A. Manousos, J. Marganiec, C. Massimi, T. Martinez, P. F. Mastinu, M. Mastromarco, M. Meaze, A. Mengon, E. Mendoza, P. M. Milazzo, T. Mingrone, M. Mirea, W. Mondelaers, A. Pavlik, J. Perkowski, M. Pignatari, A. Plompen, J. Praena, J. M. Quesada, T. Rauscher, R. Reifhart, A. Riego, F. Roman, C. Rubbia, R. Sarmento, P. Schillebeeckx, S. Schmidt, D. Schumann, J. L. Taín, G. Tagliente, A. Tsinganis, S. Valenta, G. Vannini, V. Variale, P. Vaz, A. Ventura, R. Versaci, M. J. Vermeulen, V. Vlachoudis, V. Vlastou, A. Wallner, T. Ware, M. Weigand, C. Weiss, T. Wright, G. Zç

Centre for Astrophysics Research (CAR)

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Abstract

Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular Th. The measurement has been performed at n-TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of U below 3 keV where the emission is isotropic. In the case of Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered.

Original language	English
Title of host publication	EPJ Web of Conferences
Publisher	EDP Sciences
Pages	08003
Number of pages	7
Volume	62
ISBN (Print)	9782759811236
DOIs	https://doi.org/10.1051/epjconf/20136208003
Publication status	Published - 13 Dec 2013
Event	Fission 2013 - 5th Int Workshop on Nuclear Fission & Fission Product Spectroscopy - Cain, France Duration: 28 May 2013 → 31 May 2013

Conference

Conference	Fission 2013 - 5th Int Workshop on Nuclear Fission & Fission Product Spectroscopy
Country/Territory	France
City	Cain
Period	28/05/13 → 31/05/13

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10.1051/epjconf/20136208003

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This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
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Leong, L. S., Tassan-Got, L., Tarrio, D., Audouin, L., Paradela, C., Duran, I., Le Naour, C., Altstadt, S., Andrzejewsky, J., Barbagallo, M., Becares, V., Bečvář, F., Belloni, F., Berthoumieux, E., Billowes, J., Boccone, V., Bosnar, D., Brugger, M., Calvino, F., ... Zç, G. (2013). Angular distribution in the neutron-induced fission of actinides. In EPJ Web of Conferences (Vol. 62, pp. 08003). EDP Sciences. https://doi.org/10.1051/epjconf/20136208003

@inproceedings{3cf168a5e961424fb7cba84b4ee9315f,

title = "Angular distribution in the neutron-induced fission of actinides",

abstract = "Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular Th. The measurement has been performed at n-TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of U below 3 keV where the emission is isotropic. In the case of Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered.",

author = "Leong, {L. S.} and L. Tassan-Got and D. Tarrio and L. Audouin and C. Paradela and I. Duran and {Le Naour}, C. and S. Altstadt and J. Andrzejewsky and M. Barbagallo and V. Becares 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 F. Calvino and M. Calviani and D. Cano-Ott and C. Carrapico and F. Cerutti and E. Chiaveri and M. Chin and N. Colonna and G. Cortes and Cortes-Giraldo, {M. A.} and M. Diakaki and C. Domingo-Pardo and R. Dressler and N. Dzysiuk and C. Eleftheriadis and A. Ferrari and K. Fraval and S. Ganesan and Garcia, {A. R.} and G. Giubrone and Gomez-Hornillos, {M. B.} and Goncalves, {I. F.} and R. Gonz{\'a}lez and E. Griesmayer and C. Guerrero and F. Gunsing and P. Gurusamy and Jenkins, {D. G.} and E. Jericha and E. Kadi and F. K{\"a}ppeler and D. Karadimos and N. Kivel and P. Koehler and M. Kokkoris and G. Korschinek and J. Kroll and M. Krti{\v c}ka and C. Langer and C. Lederer and H. Leeb and R. Losito and A. Manousos and J. Marganiec and C. Massimi and T. Martinez and Mastinu, {P. F.} and M. Mastromarco and M. Meaze and A. Mengon and E. Mendoza and Milazzo, {P. M.} and T. Mingrone and M. Mirea and W. Mondelaers and A. Pavlik and J. Perkowski and M. Pignatari and A. Plompen and J. Praena and Quesada, {J. M.} and T. Rauscher and R. Reifhart and A. Riego and F. Roman and C. Rubbia and R. Sarmento and P. Schillebeeckx and S. Schmidt and D. Schumann and Ta{\'i}n, {J. L.} and G. Tagliente and A. Tsinganis and S. Valenta and G. Vannini and V. Variale and P. Vaz and A. Ventura and R. Versaci and Vermeulen, {M. J.} and V. Vlachoudis and V. Vlastou and A. Wallner and T. Ware and M. Weigand and C. Weiss and T. Wright and G. Z{\c c}",

note = "This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited; Fission 2013 - 5th Int Workshop on Nuclear Fission & Fission Product Spectroscopy ; Conference date: 28-05-2013 Through 31-05-2013",

year = "2013",

month = dec,

day = "13",

doi = "10.1051/epjconf/20136208003",

language = "English",

isbn = "9782759811236",

volume = "62",

pages = "08003",

booktitle = "EPJ Web of Conferences",

publisher = "EDP Sciences",

address = "France",

}

Leong, LS, Tassan-Got, L, Tarrio, D, Audouin, L, Paradela, C, Duran, I, Le Naour, C, Altstadt, S, Andrzejewsky, J, Barbagallo, M, Becares, V, Bečvář, F, Belloni, F, Berthoumieux, E, Billowes, J, Boccone, V, Bosnar, D, Brugger, M, Calvino, F, Calviani, M, Cano-Ott, D, Carrapico, C, Cerutti, F, Chiaveri, E, Chin, M, Colonna, N, Cortes, G, Cortes-Giraldo, MA, Diakaki, M, Domingo-Pardo, C, Dressler, R, Dzysiuk, N, Eleftheriadis, C, Ferrari, A, Fraval, K, Ganesan, S, Garcia, AR, Giubrone, G, Gomez-Hornillos, MB, Goncalves, IF, González, R, Griesmayer, E, Guerrero, C, Gunsing, F, Gurusamy, P, Jenkins, DG, Jericha, E, Kadi, E, Käppeler, F, Karadimos, D, Kivel, N, Koehler, P, Kokkoris, M, Korschinek, G, Kroll, J, Krtička, M, Langer, C, Lederer, C, Leeb, H, Losito, R, Manousos, A, Marganiec, J, Massimi, C, Martinez, T, Mastinu, PF, Mastromarco, M, Meaze, M, Mengon, A, Mendoza, E, Milazzo, PM, Mingrone, T, Mirea, M, Mondelaers, W, Pavlik, A, Perkowski, J, Pignatari, M, Plompen, A, Praena, J, Quesada, JM, Rauscher, T, Reifhart, R, Riego, A, Roman, F, Rubbia, C, Sarmento, R, Schillebeeckx, P, Schmidt, S, Schumann, D, Taín, JL, Tagliente, G, Tsinganis, A, Valenta, S, Vannini, G, Variale, V, Vaz, P, Ventura, A, Versaci, R, Vermeulen, MJ, Vlachoudis, V, Vlastou, V, Wallner, A, Ware, T, Weigand, M, Weiss, C, Wright, T & Zç, G 2013, Angular distribution in the neutron-induced fission of actinides. in EPJ Web of Conferences. vol. 62, EDP Sciences, pp. 08003, Fission 2013 - 5th Int Workshop on Nuclear Fission & Fission Product Spectroscopy, Cain, France, 28/05/13. https://doi.org/10.1051/epjconf/20136208003

TY - GEN

T1 - Angular distribution in the neutron-induced fission of actinides

AU - Leong, L. S.

AU - Tassan-Got, L.

AU - Tarrio, D.

AU - Audouin, L.

AU - Paradela, C.

AU - Duran, I.

AU - Le Naour, C.

AU - Altstadt, S.

AU - Andrzejewsky, J.

AU - Barbagallo, M.

AU - Becares, V.

AU - Bečvář, F.

AU - Belloni, F.

AU - Berthoumieux, E.

AU - Billowes, J.

AU - Boccone, V.

AU - Bosnar, D.

AU - Brugger, M.

AU - Calvino, F.

AU - Calviani, M.

AU - Cano-Ott, D.

AU - Carrapico, C.

AU - Cerutti, F.

AU - Chiaveri, E.

AU - Chin, M.

AU - Colonna, N.

AU - Cortes, G.

AU - Cortes-Giraldo, M. A.

AU - Diakaki, M.

AU - Domingo-Pardo, C.

AU - Dressler, R.

AU - Dzysiuk, N.

AU - Eleftheriadis, C.

AU - Ferrari, A.

AU - Fraval, K.

AU - Ganesan, S.

AU - Garcia, A. R.

AU - Giubrone, G.

AU - Gomez-Hornillos, M. B.

AU - Goncalves, I. F.

AU - González, R.

AU - Griesmayer, E.

AU - Guerrero, C.

AU - Gunsing, F.

AU - Gurusamy, P.

AU - Jenkins, D. G.

AU - Jericha, E.

AU - Kadi, E.

AU - Käppeler, F.

AU - Karadimos, D.

AU - Kivel, N.

AU - Koehler, P.

AU - Kokkoris, M.

AU - Korschinek, G.

AU - Kroll, J.

AU - Krtička, M.

AU - Langer, C.

AU - Lederer, C.

AU - Leeb, H.

AU - Losito, R.

AU - Manousos, A.

AU - Marganiec, J.

AU - Massimi, C.

AU - Martinez, T.

AU - Mastinu, P. F.

AU - Mastromarco, M.

AU - Meaze, M.

AU - Mengon, A.

AU - Mendoza, E.

AU - Milazzo, P. M.

AU - Mingrone, T.

AU - Mirea, M.

AU - Mondelaers, W.

AU - Pavlik, A.

AU - Perkowski, J.

AU - Pignatari, M.

AU - Plompen, A.

AU - Praena, J.

AU - Quesada, J. M.

AU - Rauscher, T.

AU - Reifhart, R.

AU - Riego, A.

AU - Roman, F.

AU - Rubbia, C.

AU - Sarmento, R.

AU - Schillebeeckx, P.

AU - Schmidt, S.

AU - Schumann, D.

AU - Taín, J. L.

AU - Tagliente, G.

AU - Tsinganis, A.

AU - Valenta, S.

AU - Vannini, G.

AU - Variale, V.

AU - Vaz, P.

AU - Ventura, A.

AU - Versaci, R.

AU - Vermeulen, M. J.

AU - Vlachoudis, V.

AU - Vlastou, V.

AU - Wallner, A.

AU - Ware, T.

AU - Weigand, M.

AU - Weiss, C.

AU - Wright, T.

AU - Zç, G.

N1 - This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

PY - 2013/12/13

Y1 - 2013/12/13

N2 - Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular Th. The measurement has been performed at n-TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of U below 3 keV where the emission is isotropic. In the case of Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered.

AB - Above 1 MeV of incident neutron energy the fission fragment angular distribution (FFAD) has generally a strong anisotropic behavior due to the combination of the incident orbital momentum and the intrinsic spin of the fissioning nucleus. This effect has to be taken into account for the efficiency estimation of devices used for fission cross section measurements. In addition it bears information on the spin deposition mechanism and on the structure of transitional states. We designed and constructed a detection device, based on Parallel Plate Avalanche Counters (PPAC), for measuring the fission fragment angular distributions of several isotopes, in particular Th. The measurement has been performed at n-TOF at CERN taking advantage of the very broad energy spectrum of the neutron beam. Fission events were recognized by back to back detection in coincidence in two position-sensitive detectors surrounding the targets. The detection efficiency, depending mostly on the stopping of fission fragments in backings and electrodes, has been computed with a Geant4 simulation and validated by the comparison to the measured case of U below 3 keV where the emission is isotropic. In the case of Th, the result is in good agreement with previous data below 10 MeV, with a good reproduction of the structures associated to vibrational states and the opening of second chance fission. In the 14 MeV region our data are much more accurate than previous ones which are broadly scattered.

UR - http://www.scopus.com/inward/record.url?scp=84893292677&partnerID=8YFLogxK

U2 - 10.1051/epjconf/20136208003

DO - 10.1051/epjconf/20136208003

M3 - Conference contribution

AN - SCOPUS:84893292677

SN - 9782759811236

VL - 62

SP - 08003

BT - EPJ Web of Conferences

PB - EDP Sciences

T2 - Fission 2013 - 5th Int Workshop on Nuclear Fission & Fission Product Spectroscopy

Y2 - 28 May 2013 through 31 May 2013

ER -

Angular distribution in the neutron-induced fission of actinides

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