Thorium s-wave neutron widths from 21 to 2006 eV

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A /sup 232/Th total cross section measurement in the resolved resonance region has been requested with a 2% accuracy in order to obtain resonance parameters with a 5% accuracy. These data are required for both fast and light-water breeder reactor studies. Inspection of the prior /sup 232/Th differential data base shows several problems: the thermal cross sections seem inconsistent; the measured capture widths have large uncertanties; the two rather complete sets of measured neutron widths are systematically discrepant; and the differential data appear to give Cd capture ratios and shielded-capture resonance integrals smaller than those required by integral measurements. In ... continued below

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Pages: 9

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Olsen, D.K.; Ingle, R.W. & Portney, J.L. January 1, 1981.

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Description

A /sup 232/Th total cross section measurement in the resolved resonance region has been requested with a 2% accuracy in order to obtain resonance parameters with a 5% accuracy. These data are required for both fast and light-water breeder reactor studies. Inspection of the prior /sup 232/Th differential data base shows several problems: the thermal cross sections seem inconsistent; the measured capture widths have large uncertanties; the two rather complete sets of measured neutron widths are systematically discrepant; and the differential data appear to give Cd capture ratios and shielded-capture resonance integrals smaller than those required by integral measurements. In order to improve the differential data base we have measured neutron transmission spectra through eight samples of /sup 232/Th. Resonance parameters have been obtained from these data using the computer code S10B. Fits to these data up to 440 eV, which concentrated on the capture widths, have been previously reported. The results of extending these fits to 2.0 keV are reported and discussed in terms of the s-wave strength function and the dilute-capture resonance integral. (WHK)

Physical Description

Pages: 9

Notes

NTIS, PC A02/MF A01.

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  • American Nuclear Society's annual meeting, Miami Beach, FL, USA, 7 Jun 1981

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  • Other: DE81023272
  • Report No.: CONF-810606-50
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 6228112
  • Archival Resource Key: ark:/67531/metadc1109960

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1981

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  • Feb. 22, 2018, 7:45 p.m.

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  • March 26, 2018, 12:57 p.m.

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Olsen, D.K.; Ingle, R.W. & Portney, J.L. Thorium s-wave neutron widths from 21 to 2006 eV, article, January 1, 1981; United States. (digital.library.unt.edu/ark:/67531/metadc1109960/: accessed April 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.