Электронный каталог

Статья

Xia, C.
Cross Section Measurement for the *1*6O(n,*a&sub(0))*1*3C Reaction in 6.8-11.7 MeV Neutron Energy Region / C.Xia, L.Krupa, [a.o.]. – Text : electronic // The European Physical Journal A. – 2025. – Vol. 61, No. 11. – P. 246. – URL: https://doi.org/10.1140/epja/s10050-025-01730-2. – Bibliogr.: 42.

Cross sections of the *1*6O(n, α0) *1*3C 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 &sup(238)U&sub(3)O&sub(8) sample inside the GIC was used to determine the neutron fluences and an EJ309 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.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 343 г - Взаимодействие нейтронов с ядрами