Indirect determination of the 230Th(n, f ) and 231Th(n, f ) cross sections for thorium-based nuclear energy systems - Archive ouverte HAL Access content directly
Journal Articles Physical Review C Year : 2009

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

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B.L. Goldblum
  • Function : Author
S.R. Stroberg
  • Function : Author
J.M. Allmond
  • Function : Author
C. Angell
  • Function : Author
L.A. Bernstein
  • Function : Author
D.L. Bleuel
  • Function : Author
J.T. Burke
  • Function : Author
J. Gibelin
L. Phair
  • Function : Author
N.D. Scielzo
  • Function : Author
E. Swanberg
  • Function : Author
M. Wiedeking
  • Function : Author
E.B. Norman
  • Function : Author

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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Dates and versions

in2p3-00431896 , version 1 (13-11-2009)

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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, 2009, 80, pp.044610. ⟨10.1103/PhysRevC.80.044610⟩. ⟨in2p3-00431896⟩
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