Browsing by Author "Lamula, Thobeka Patience"

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    Cross section measurements for neutron induced reactions on Bi targets using quasi mono-energetic neutron beams of 90 and 140 MeV
    (University of Zululand, 2017) Lamula, Thobeka Patience; Maleka, S.S; Ntshangase, S.S; Nchodu, M.R
    Cross section measurements for 209Bi(n,3-5n)xBi reactions were performed using quasi-monoenergetic neutron beams of 90 and 140 MeV energies. Neutron beams were produced from the 7Li(p,n)7Be reaction using the neutron beam facility of iThemba Laboratory for Accelerator Based Science (LABS). Neutron activated target materials ( 209Bi) were anal-ysed for gamma-ray emission with the available HPGe gamma-ray detector system of the ERL. From the identi_ed radionuclides, their activities were determined and subsequently their production cross sections were calculated. The cross section data found from this work was compared with the existing experimental as well as the available evaluated data of the International Reactor Dosimetry Fusion File (IRDFF) library. The comparison with the reported data show good agreement. Currently, other parameters are still outstanding to finalise the comparison and finally conclude the uncertainty components. The cross section data from this work will be important for testing, improving and extending the IRDFF library since the existing experimental data for high energy neutrons are insufficient.To the IRDFF library, the current contribution from iThemba LABS will improve the Bismuth (Bi) data for high threshold energy (n,xn) reactions with cross section peaks located at 90 and 140 MeV energies.