The cross section for the K(n,p)Ar reaction between 14.2 and 17.2 MeV |
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Authors: | S K GhoraiJ R Williams W L Alford |
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Affiliation: | Alabama State University, Montgomery, AL 36195, U.S.A. Auburn University, Auburn, AL 36849, U.S.A. |
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Abstract: | Activation techniques have been used to measure the cross section for the 41K(n,p)41Ar reaction between 14.2 and 17.2 MeV. Neutrons were produced by the 3H(d,n)4He reaction, and the mixed-power method was used to measure the neutron flux through the 27Al(n, )24Na reaction. The activated samples were counted for the 1294 keV, 1.827 h γ-activity of 41Ar and the 1369 keV, 15.03 h γ-activity of 24Na using a 16% Ge(Li) detector and a 4096-channel analyzer. The cross sections for the 41K(n,p)41Ar reaction using the mixed-power method were found to be 53 ± 3 mbarn at 14.2 ± 0.2 MeV, 47 ± 3 mbarn at 15.2 ± 0.2 MeV, 41 ± 3 mbarn at 16.2 ± 0.2 MeV and 36 ± 4 mbarn at 17.2 ± 0.2 MeV. The associated-particle method was also used for measuring the neutron flux in order to check the mixed-powder result at 14.2 MeV. The average cross section for three associated-particle runs at 14.2 MeV was found to be 50 ± 3 mbarn which, within experimental error, agrees with the mixed-powder value. |
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