Measurement of Fragment Mass Yields in Neutron-induced Fission of (232)Th and (238)U at 33, 45 and 60 MeV
2011 (English)In: Journal of the Korean Physical Society, ISSN 0374-4884, Vol. 59, no 2, 1864-1867 p.Article in journal (Refereed) Published
Incineration of spent nuclear fuel in Accelerator Driven Systems requires nuclear data on neutron-induced fission of actinides at energies above 20 MeV - the upper limit of conventional evaluated nuclear data files. Over the past years, a significant effort has been devoted to measurements of neutron-induced fission cross-sections at intermediate energies but there is a lack of experimental data on fission yields. Here we describe recent measurements of pre-neutron emission fragment mass distributions from intermediate energy neutron-induced fission of (232)Th and (238)U. The measurements have been carried out at the neutron beam of the Louvain-la-Neuve cyclotron facility CYCLONE. Quasi-monoenergetic neutrons with peak energies at 32.8, 45.3 and 59.9 MeV were produced by protons impinging on a thin lithium target. A multi-section Frisch-gridded ionization chamber was used as a fission fragment detector. The measurement results are compared with available experimental data as well as with predictions of the multi-modal random neck-rupture model implemented into the TALYS code.
Place, publisher, year, edition, pages
2011. Vol. 59, no 2, 1864-1867 p.
ADS, Neutron-induced fission, Fission fragment mass yield, Intermediate energy
IdentifiersURN: urn:nbn:se:uu:diva-159055DOI: 10.3938/jkps.59.1864ISI: 000294080700099OAI: oai:DiVA.org:uu-159055DiVA: diva2:442807