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- W2500111160 abstract "Measurements of the neutron and gamma-ray leakage spectra from 15 spherical target assemblies (carbon, nitrogen, H2O, C2F4, aluminum, silicon, titanium, iron, copper, tantalum, tungsten, gold, lead, 232Th, and 238U) pulsed with 14-MeV neutrons were made using time-of-flight techniques. The spheres were ∼30 g/cm2 thick to maximize the gamma-ray leakage per central source neutron. Among all the materials studied, silicon shows the highest conversion factor (∼2 γMeV/n), and lead the lowest (0.31 γMeV/n). Monte Carlo neutron-photon transport calculations were done using the TART and SANDYL codes, with the ENDL and ENDF/B-V libraries. Comparisons with the neutron measurements confirm earlier results, where both libraries reproduced the leakage spectra for most of these materials reasonably well. The gamma spectra calculated with ENDL give a fair representation of the measurements, with the exception of the initial calculations for 16O(H2O) and 19F(C2F4), where serious discrepancies are found. Improvements were obtained for 16O after a re-evaluation of the neutron-induced cross sections based on more recent microscopic experimental data. This was also the case for 19F, where the calculations now overestimate the measurements by 30%. Calculations with the ENDF/B-V are lower than the experimental measurements for most of the materials." @default.
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- W2500111160 date "1990-08-01" @default.
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- W2500111160 title "Neutron and Gamma-Ray Spectra from a Variety of Materials Bombarded with 14-MeV Neutrons" @default.
- W2500111160 doi "https://doi.org/10.13182/nse90-a21468" @default.
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