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dc.contributor.authorLeong, L.S.
dc.contributor.authorTassan Got, Laurence
dc.contributor.authorTarrío, D.
dc.contributor.authorCalviño Tavares, Francisco
dc.contributor.authorCortés Rossell, Guillem Pere
dc.contributor.authorGómez Hornillos, María Belén
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.identifier.citationLeong, L. [et al.]. Angular distribution in the neutron-induced fission of actinides. A: International Workshop on Nuclear Fission and Fission Product Spectroscopy. "EPJ Web of Conferences Volume 62". EPJ Web of Conferences, 2013, p. 1-7.
dc.description.abstractAbove 1MeV 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 10MeV, with a good reproduction of the structures associated to vibrational states and the opening of econd chance fission. In the 14MeV region our data are much more accurate than previous ones which are broadly scattered.
dc.format.extent7 p.
dc.publisherEPJ Web of Conferences
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.subjectÀrees temàtiques de la UPC::Física
dc.subjectÀrees temàtiques de la UPC::Energies::Energia nuclear
dc.subject.lcshNuclear physics
dc.subject.otherNeutron induced fission
dc.subject.otherNuclear reaction
dc.subject.otherCross section
dc.titleAngular distribution in the neutron-induced fission of actinides
dc.typeConference report
dc.subject.lemacFísica nuclear
dc.contributor.groupUniversitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
local.citation.authorLeong, L.; Tassan, L.; Tarrío, D.; Calviño, F.; Cortes, G.; Gómez, M. B.
local.citation.contributorInternational Workshop on Nuclear Fission and Fission Product Spectroscopy
local.citation.publicationNameEPJ Web of Conferences Volume 62

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