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Indirect determination of the 230Th(n, f ) and 231Th(n, f ) cross sections for thorium-based nuclear energy systems

Abstract : The surrogate ratio method (SRM) was employed in the first experimental determination of the 231Th(n,f ) cross section, relative to the 235U(n,f ) cross section, over an equivalent neutron energy range of 360 keV to 10 MeV. The 230Th(n,f ) cross section was also deduced using the SRM, relative to the 234U(n,f ) cross section, over an equivalent neutron energy range of 220 keV to 25 MeV. The desired compound nuclei were populated using (3He,3He ) and (3He,α) reactions on targets of 232Th and 236U and relative fission decay probabilities were measured. The surrogate 230,231Th(n,f ) cross sections were compared to cross section evaluations and directly-measured experimental data, where available.
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http://hal.in2p3.fr/in2p3-00431896
Contributor : Michel Lion <>
Submitted on : Friday, November 13, 2009 - 2:50:04 PM
Last modification on : Tuesday, February 19, 2019 - 10:00:04 AM

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B.L. Goldblum, S.R. Stroberg, J.M. Allmond, C. Angell, L.A. Bernstein, et al.. Indirect determination of the 230Th(n, f ) and 231Th(n, f ) cross sections for thorium-based nuclear energy systems. Physical Review C, American Physical Society, 2009, 80, pp.044610. ⟨10.1103/PhysRevC.80.044610⟩. ⟨in2p3-00431896⟩

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