KARAMANIS, D.; PETIT, M.; ANDRIAMONJE, S.; BARREAU, G.; BERCION, M.; BILLEBAUD, A.; BLANK, Bertram; CZAJKOWSKI, S.; DEL MORAL, R.; GIOVINAZZO, J.; LACOSTE, V.; MARCHAND, C.; PERROT, L.; PRAVIKOFF, M.; THOMAS, J.C.

doi:10.13182/NSE01-A2238

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KARAMANIS, D.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

PETIT, M.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

ANDRIAMONJE, S.
Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG]

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Nuclear Science and Engineering. 2001, vol. 139, p. 282-292

Academic Press

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The neutron capture cross section of 232Th has been measured relative to σ(n, γ) for 197Au and σ(n,f) for 235U in the energy range from 60 keV to 2 MeV. Neutrons were produced by the 7Li(p,n) and T(p,n) reactions at the 4-MV Van de Graaff Accelerator of CEN Bordeaux-Gradignan. The activation technique was used, and the cross section was measured relative to the 197Au(n,γ) standard cross section up to 1 MeV. The characteristic gamma lines of the product nuclei 233Pa and 198Au were measured with a 40% high-purity germanium detector. Above this energy, the reaction 235U(n,f) was also used as a second standard, and the fission fragments were detected with a photovoltaic cell. The results, after applying the appropriate corrections, indicate that the cross sections are close to the JENDL-3 database values up to 800 keV and over 1.4 MeV. For energies in the intermediate range, our values are slightly lower than those from all the libraries. (ANS)< Réduire

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Neutron radiative capture cross section of $^{232}$Th in the energy range from 0.06 to 2 MeV

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