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Determination of (n, 2n) Reaction Isomeric Cross Section for 87Rb, 112Cd, 138Bz, and 186W Using 14 MeV Neutrons

The purpose of this investigation was to measure the cross section for each of the reactions 87Rb(n, 2n) 86mRb, 112Cd(n, 2n)111mCd, 138Ba(n, 2n) 137mBa and 186W(n, 2n) 185mW at 14.7 ± 0.03 MeV incident neutron energy. The incident neutron flux was determined during each irradiation from the activity produced in copper or aluminum disks between which the isotopically enriched sample was sandwiched. The 63Cu(n, 2n)62Cu and 27Al(n, p)27Mg reaction cross sections were assumed to be 593 ± 45 mb and 73 ± 5 mb respectively.
The activity of the sample and monitors was determined by using a 7.6 cm x 7.6 cm NaI(Tl) scintillation spectrometer calibrated with NBS standard sources or by employing the coincidence method in the case of the copper monitors.
The measured cross sections in this experiment were 87Rb(n, 2n)86mRb (450 ±51 mb), 112CD(n, 2n)111mCd (400 ± 45 mb), 138Ba(n, 2n) 137mBa (769 ± 87 mb), and 186W(n, 2n)185mW (602 ± 74 mb).

Identiferoai:union.ndltd.org:WKU/oai:digitalcommons.wku.edu:theses-2741
Date01 August 1973
CreatorsKao, Hsiao-Chueh
PublisherTopSCHOLAR®
Source SetsWestern Kentucky University Theses
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceMasters Theses & Specialist Projects

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