Fast-Neutron Spectra and Related Quantities

Fast Spectrum Measurements On a Sub-critical Section of the Thermionic Critical Experiment, S. C. Cohen, R. A. Mdpre, J. L. Russell, Jr. (GGA)  

The angular flux spectrum was computed using the DTF-IV code in an approximation (Lobatto quadrature) to the transport equation. The GAM-]1 code was used to obtain 27-group, P, cross sections Cor the constituents of the subcritical assembly. Energy self-shielding calculations for were performed with the 

The measured and predicted spectra were normalized to a constant value of integrated fissions and are compared In Fig. 2. The results demonstrate the need for consideration of unresolved resonance self-shielding in U, and suggest that the U absorption cross-section data may be slightly high at low energies (100 eV E 2 keV). 

Profto et al., Time-of-Flight Measurements of Neutron Spectra in U-235 and Tungsten, GA-7427, General Atomic (1966). 

Thermionic Critical Experiment Program, GA-8309, Gulf General Atomic Incorporated (1967). 

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