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Neutron Total and Absorption Cross Sections of 238Pu

T. E. Young, F. B. Simpson, J. R. Berreth, M. S. Coops

Nuclear Science and Engineering / Volume 30 / Number 3 / Pages 355-361

December 1967

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The neutron total cross section of 238Pu has been measured from 0.008 to 6500 eV. These data give single-level Breit-Wigner parameters for resonances below 200 eV. The observed total cross section at 2200 m/sec is 588 b. A value of 532 b has been calculated for the effective (equivalent l/v) thermal absorption cross section. Parameters of individual resonances below 200 eV and average parameters at higher energies give a resonance absorption integral of 164 ± 15 b, and a value of (1.10 ± 0.20) × 10-4 for the s-wave neutron strength function (/D).

 
 
 
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