Regular Article - Experimental Physics
Ratios of the cross sections for the 10B(n, α)7Li reaction to the 6Li(n, t)4He reaction
State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, 100871, Beijing, China
2 Institute of Materials, China Academy of Engineering Physics, 621907, Jiangyou, China
Accepted: 24 March 2023
Published online: 16 May 2023
The ratios of the differential and angle-integrated cross sections for the 10B(n, α)7Li reaction (including (n, α), (n, α0) and (n, α1)) to the 6Li(n, t)4He reaction are obtained by re-analyzing our previous measurement data to avoid the uncertainty of the neutron fluences. Present results, with much smaller uncertainties and covering a large neutron energy region from 1.0 eV to several MeV, will be useful in the improvement of the neutron cross section standards. The normalized ratios of the differential and angle-integrated cross sections are in good agreement with the ratios calculated from the evaluation data in the ENDF/B-VIII.0 and JEFF-3.3 libraries. In the neutron energy region from 1.0 to 1.0 keV, the relative uncertainties of the present ratios are significantly reduced compared with those of our previous results of both the 10B(n, α)7Li and the 6Li(n, t)4He reactions. New measurements for the 10B(n, α)7Li reaction with higher precision are demanded, especially in the neutron energy region higher than 0.5 MeV where the relative uncertainties of the present ratios are dominated by those of the previous 10B(n, α)7Li cross sections which are larger than those of the 6Li(n, t)4He cross sections.
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