EPJ Web of Conferences (Dec 2013)
Angular distribution in the neutron-induced fission of actinides
- Leong L.S.,
- Tassan-Got L.,
- Tarrio D.,
- Audouin L.,
- Paradela C.,
- Duran I.,
- Le Naour C.,
- Altstadt S.,
- Andrzejewsky J.,
- Barbagallo M.,
- Bécares V.,
- Bečvář F.,
- Belloni F.,
- Berthoumieux E.,
- Billowes J.,
- Boccone V.,
- Bosnar D.,
- Brugger M.,
- Calvino F.,
- Calviani M.,
- Cano-Ott D.,
- Carrapiço C.,
- Cerutti F.,
- Chiaveri E.,
- Chin M.,
- Colonna N.,
- Cortés G.,
- Cortés-Giraldo M.A.,
- Diakaki M.,
- Domingo-Pardo C.,
- Dressler R.,
- Dzysiuk N.,
- Eleftheriadis C.,
- Ferrari A.,
- Fraval K.,
- Ganesan S.,
- García A.R.,
- Giubrone G.,
- Gómez-Hornillos M.B.,
- Gonçalves I.F.,
- González-Romero ,
- Griesmayer E.,
- Guerrero C.,
- Gunsing F.,
- Gurusamy P.,
- Jenkins D.G.,
- 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.,
- Martínez T.,
- Mastinu P.F.,
- Mastromarco M.,
- Meaze M.,
- Mengon A.,
- Mendoza E.,
- Milazzo P.M.,
- Mingrone T.,
- Mirea M.,
- Mondelaers W.,
- Pavlik A.,
- Perkowski J.,
- Pignatari M.,
- Plompen A.,
- Praena J.,
- Quesada J.M.,
- Rauscher T.,
- Reifhart R.,
- Riego A.,
- Roman F.,
- Rubbia C.,
- Sarmento R.,
- Schillebeeckx P.,
- Schmidt S.,
- Schumann D.,
- Taín J.L.,
- Tagliente G.,
- Tsinganis A.,
- Valenta S.,
- Vannini G.,
- Variale V.,
- Vaz P.,
- Ventura A.,
- Versaci R.,
- Vermeulen M.J.,
- Vlachoudis V.,
- Vlastou V.,
- Wallner A.,
- Ware T.,
- Weigand M.,
- Weiß C.,
- Wright T.,
- Zǔgec
Affiliations
- Leong L.S.
- Institut de Physique Nucléaire, CNRS, Unviersité Paris-Sud
- Tassan-Got L.
- Institut de Physique Nucléaire, CNRS, Unviersité Paris-Sud
- Tarrio D.
- Facultad de Fisica, Universidade de Santiago de Compostela
- Audouin L.
- Institut de Physique Nucléaire, CNRS, Unviersité Paris-Sud
- Paradela C.
- Facultad de Fisica, Universidade de Santiago de Compostela
- Duran I.
- Facultad de Fisica, Universidade de Santiago de Compostela
- Le Naour C.
- Institut de Physique Nucléaire, CNRS, Unviersité Paris-Sud
- Altstadt S.
- Johann-Wolfgang-Goethe Universität, Frankfurt
- Andrzejewsky J.
- Uniwersytet Lódzki, Lodz
- Barbagallo M.
- Istituto Nazionale di Fisica Nucleare
- Bécares V.
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Bečvář F.
- Charles University
- Belloni F.
- Commissariat à l'Energie Atomique (CEA) Saclay- Irfu
- Berthoumieux E.
- Billowes J.
- University of Manchester
- Boccone V.
- European Organization for Nuclear Research (CERN)
- Bosnar D.
- Brugger M.
- European Organization for Nuclear Research (CERN)
- Calvino F.
- Universitat Politecnica de Catalunya
- Calviani M.
- European Organization for Nuclear Research (CERN)
- Cano-Ott D.
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Carrapiço C.
- Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa
- Cerutti F.
- European Organization for Nuclear Research (CERN)
- Chiaveri E.
- European Organization for Nuclear Research (CERN)
- Chin M.
- European Organization for Nuclear Research (CERN)
- Colonna N.
- Istituto Nazionale di Fisica Nucleare
- Cortés G.
- Universitat Politecnica de Catalunya
- Cortés-Giraldo M.A.
- Universidad de Sevilla
- Diakaki M.
- National Technical University of Athens (NTUA)
- Domingo-Pardo C.
- IFIC, Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia
- Dressler R.
- IFIC, Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia
- Dzysiuk N.
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
- Eleftheriadis C.
- Aristotle University of Thessaloniki
- Ferrari A.
- European Organization for Nuclear Research (CERN)
- Fraval K.
- Commissariat à l'Energie Atomique (CEA) Saclay- Irfu
- Ganesan S.
- Bhabha Atomic Research Centre (BARC)
- García A.R.
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Giubrone G.
- IFIC, Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia
- Gómez-Hornillos M.B.
- Universitat Politecnica de Catalunya
- Gonçalves I.F.
- Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa
- González-Romero
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Griesmayer E.
- Atominstitut, Technische Universitat Wien
- Guerrero C.
- European Organization for Nuclear Research (CERN)
- Gunsing F.
- Commissariat à l'Energie Atomique (CEA) Saclay- Irfu
- Gurusamy P.
- Bhabha Atomic Research Centre (BARC)
- Jenkins D.G.
- University of York
- Jericha E.
- Atominstitut, Technische Universitat Wien
- Kadi E.
- European Organization for Nuclear Research (CERN)
- Käppeler F.
- Karlsruhe Institute of Technology, Campus Nord, Institut für Kernphysik
- Karadimos D.
- National Technical University of Athens (NTUA)
- Kivel N.
- Paul Scherrer Institut
- Koehler P.
- Oak Ridge National Laboratory (ORNL)
- Kokkoris M.
- National Technical University of Athens (NTUA)
- Korschinek G.
- Technical University of Munich
- Kroll J.
- Charles University
- Krtička M.
- Charles University
- Langer C.
- Johann-Wolfgang-Goethe Universität, Frankfurt
- Lederer C.
- Leeb H.
- Atominstitut, Technische Universitat Wien
- Losito R.
- European Organization for Nuclear Research (CERN)
- Manousos A.
- Aristotle University of Thessaloniki
- Marganiec J.
- Uniwersytet Lódzki, Lodz
- Massimi C.
- Dipartimento di Fisica, Universita di Bologna, and Sezione INFN di Bologna
- Martínez T.
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Mastinu P.F.
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro
- Mastromarco M.
- Istituto Nazionale di Fisica Nucleare
- Meaze M.
- Istituto Nazionale di Fisica Nucleare
- Mengon A.
- Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile (ENEA)
- Mendoza E.
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Milazzo P.M.
- Istituto Nazionale di Fisica Nucleare
- Mingrone T.
- Centro de Investigaciones Energeticas Medioambientales y Tecnologicas (CIEMAT)
- Mirea M.
- Horia Hulubei National Institute of Physics and Nuclear Engineering – IFIN HH
- Mondelaers W.
- European Commission JRC, Institute for Reference Materials and Measurements
- Pavlik A.
- University of Vienna, Faculty of Physics
- Perkowski J.
- Uniwersytet Lódzki, Lodz
- Pignatari M.
- Department of Physics and Astronomy, University of Basel
- Plompen A.
- European Commission JRC, Institute for Reference Materials and Measurements
- Praena J.
- Universidad de Sevilla
- Quesada J.M.
- Universidad de Sevilla
- Rauscher T.
- Department of Physics and Astronomy, University of Basel
- Reifhart R.
- Johann-Wolfgang-Goethe Universität, Frankfurt
- Riego A.
- Universitat Politecnica de Catalunya
- Roman F.
- Rubbia C.
- Sarmento R.
- Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa
- Schillebeeckx P.
- European Commission JRC, Institute for Reference Materials and Measurements
- Schmidt S.
- Johann-Wolfgang-Goethe Universität, Frankfurt
- Schumann D.
- Paul Scherrer Institut
- Taín J.L.
- IFIC, Instituto de Fisica Corpuscular, CSIC-Universidad de Valencia
- Tagliente G.
- Charles University
- Tsinganis A.
- European Organization for Nuclear Research (CERN)
- Valenta S.
- European Organization for Nuclear Research (CERN)
- Vannini G.
- Dipartimento di Fisica, Universita di Bologna, and Sezione INFN di Bologna
- Variale V.
- Istituto Nazionale di Fisica Nucleare
- Vaz P.
- Instituto Tecnologico e Nuclear, Instituto Superior Tecnico, Universidade Tecnica de Lisboa
- Ventura A.
- Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile (ENEA)
- Versaci R.
- European Organization for Nuclear Research (CERN)
- Vermeulen M.J.
- University of York
- Vlachoudis V.
- European Organization for Nuclear Research (CERN)
- Vlastou V.
- National Technical University of Athens (NTUA)
- Wallner A.
- University of Vienna, Faculty of Physics
- Ware T.
- University of Manchester
- Weigand M.
- Johann-Wolfgang-Goethe Universität, Frankfurt
- Weiß C.
- Atominstitut, Technische Universitat Wien
- Wright T.
- University of Manchester
- Zǔgec
- Department of Physics, Faculty of Science, University of Zagreb
- DOI
- https://doi.org/10.1051/epjconf/20136208003
- Journal volume & issue
-
Vol. 62
p. 08003
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 232Th. 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 235U below 3 keV where the emission is isotropic. In the case of 232Th, 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.
