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- W4386695338 abstract "Abstract The neutron-induced total cross-section of $^{209}$Bi is of significantly importance for physical design and safety assessment of Lead-based fast reactors, and the quality of experimental data needs to be improved for evaluation and application. A new measurement has been performed on the back-streaming white neutron beamline (Back-n) at the China Spallation Neutron Source (CSNS) using the neutron total cross-section spectrometer (NTOX). Neutron energy was experimentally determined with a fast multi-cell fission chamber using the time-of-flight technique. Two high-purity bismuth samples with 6 mm and 20 mm thicknesses were selected for neutron transmission measurement and comparison. The neutron total cross-sections of $^{209}$Bi in the energy range from 0.3 eV to 20 MeV were derived by considering neutron flight time determination, flight path calibration, and background subtraction. A general consistency was found comparing the experimental results with the evaluated data in the ENDF/B-VIII.0 library, and the point-wise cross-sections show fair agreement with the existing experimental data. Special attention was given to the study of resonance parameters determination, which has been analyzed using the R-matrix code SAMMY employing the Bayesian method in the energy region from 0.5 keV to 20 keV. Extracted resonance parameters were compared with previously reported results and the evaluated data. This result is the first measurement of neutron total cross-section of bismuth in such a wide energy range in a single experiment and is in favor of evaluating the corresponding reaction data for evaluated libraries and in the design of advanced lead-bismuth-based nuclear systems." @default.
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- W4386695338 date "2023-09-13" @default.
- W4386695338 modified "2023-09-27" @default.
- W4386695338 title "Measurement and analysis of the neutron-induced total cross-sections of <sup>209</sup>Bi from 0.3 eV to 20 MeV on the Back-n at CSNS" @default.
- W4386695338 doi "https://doi.org/10.1088/1674-1137/acf920" @default.
- W4386695338 hasPublicationYear "2023" @default.
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