Cross section measurement for the 16O(n, α0)13C reaction in 6.8–11.7 MeV neutron energy region
Xia C. Chen Z. Hu Y. Liu J. Wu Z. Bai H. Ren W. Gledenov Y.M. Sansarbayar E. Khuukhenkhuu G. Krupa L. Chuprakov I. Ruan X. Huang H. Ren J. Wang X. Shao B. Zhao L. Cao W. Fan T. Zhang G.
November 2025Springer
European Physical Journal A
2025#61Issue 11
Cross sections of the 16O(n, α0)13C reaction were measured in the 6.8–11.7 MeV neutron energy region based on the HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE). Two experiments were performed in 2022 and 2023 at total 21 neutron energy points. A gridded ionization chamber (GIC) was used as the charged particle detector, with working gas of 3.0 atm Kr+4.0%CO2 in 2022 and 4.0 atm Kr+3.0%CO2 in 2023. The oxygen atoms in the CO2 were used as the gas sample. A 238U3O8 sample inside the GIC was used to determine the neutron fluences and an EJ-309 scintillation detector was placed on the beam line to measure the neutron energy spectra to correct the events induced by the low-energy neutrons. Based on the present measurement cross sections and existing measurement data from the EXFOR library, R-matrix analysis was carried out for the n+16O system using the RAC code. Present cross sections are compared with existing measurement data and evaluation data. In the 6.8–9.5 MeV neutron energy region our measurement results are consistent with the evaluation data in the ENDF/B-VIII.1 library. In the 9.5–11.7 MeV neutron energy region, A peak near 10.5 MeV in the excitation function in our measurement and R-matrix calculation results was obtained while the excitation functions given by the evaluations and existing measurements have a valley structure.
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State Key Laboratory of Nuclear Physics and Technology, Institute of Heavy Ion Physics, School of Physics, Peking University, Beijing, 100871, China
Department of Physics, Tsinghua University, Beijing, 100084, China
National Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi’an, 710024, China
Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Nuclear Research Centre, National University of Mongolia, Ulaanbaatar, Mongolia
Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, Dubna, 141980, Russian Federation
Institute of Experimental and Applied Physics, Czech Technical University in Prague, Prague, 212800, Czech Republic
The Institute of Nuclear Physics, Ministry of Energy of the Republic of Kazakhstan, Almaty, 050032, Kazakhstan
China Institute of Atomic Energy, Beijing, 102413, China
State Key Laboratory of Nuclear Physics and Technology
Department of Physics
National Key Laboratory of Intense Pulsed Radiation Simulation and Effect
Frank Laboratory of Neutron Physics
Nuclear Research Centre
Flerov Laboratory of Nuclear Reactions
Institute of Experimental and Applied Physics
The Institute of Nuclear Physics
China Institute of Atomic Energy
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