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- W2804774250 abstract "Up to 1300 nuclides are yielded in fission. Of these, 271 have been identified as precursors for delayed neutron emission. An extensive reference library of delayed neutron data has been compiled which contains fission yields and branchings, delay neutron emission probabilities and spectra for each of these 271 precursor nuclides. The emphasis of the present work has been in improving the spectral data. Experimental spectra from laboratories in the United States, Germany, and Sweden have been incorporated in this evaluation. The experimental spectra have been augmented with model calculations such that the spectra included in the final library extend over the full theoretical energy range for delayed neutron emission. Models were also used to predict spectra for nuclides with no measured data. The data compiled in the precursor library have been used to calculate the aggregate behavior of delayed neutrons for the 43 fissioning systems having evaluated fission yields. Delayed neutron activities predicted using the explicit precursor data have also been approximated by three, six, nine and twelve time-groups using least squares techniques. The fitted six group data, being the more conventional representation, were also used to predict a consistent set of six-group spectra. Comparisons with the University of Lowell's recently published measurements of /sup 235/U delay interval spectra were also made. Beta-effective calculations for a simple Godiva system were performed and were compared to the experimental value." @default.
- W2804774250 created "2018-06-01" @default.
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- W2804774250 date "1989-04-01" @default.
- W2804774250 modified "2023-09-28" @default.
- W2804774250 title "Evaluation and application of delayed neutron precursor data" @default.
- W2804774250 doi "https://doi.org/10.2172/6187550" @default.
- W2804774250 hasPublicationYear "1989" @default.
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