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Fast Neutron Total and Scattering Cross Sections of Plutonium-240

A. B. Smith, P. Lambropoulos, J. F. Whalen

Nuclear Science and Engineering / Volume 47 / Number 1 / Pages 19-28

January 1972

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Experimental fast neutron total cross sections and elastic and inelastic scattering cross sections of 240Pu are reported. The total cross sections are measured from neutron energies of 0.1 to 1.5 MeV in increments of ∼25 keV. The scattering cross sections are measured at 50-keV intervals from incident neutron energies of 0.3 to 1.5 MeV. The inelastic neutron excitation cross sections of states at 42 ± 5, 140 ± 10, 300 ± 20, 600 ± 20, and 900 ± 50 keV are measured. The experimental results are discussed in the context of the optical, compound-nucleus and direct-reaction nuclear models including the effects of resonance width fluctuations and the fission process. The measured results are compared with the corresponding quantities in the evaluated nuclear data file ENDF/B.

 
 
 
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