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Measurement of Fragment Mass Yields in Neutron-induced Fission of (232)Th and (238)U at 33, 45 and 60 MeV
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2011 (English)In: Journal of the Korean Physical Society, ISSN 0374-4884, E-ISSN 1976-8524, Vol. 59, no 2, 1864-1867 p.Article in journal (Refereed) Published
Abstract [en]

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.
Keyword [en]
ADS, Neutron-induced fission, Fission fragment mass yield, Intermediate energy
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-159055DOI: 10.3938/jkps.59.1864ISI: 000294080700099OAI: oai:DiVA.org:uu-159055DiVA: diva2:442807
Available from: 2011-09-22 Created: 2011-09-21 Last updated: 2017-12-08

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Pomp, Stephan

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