Cross sections of the Ca 40 (n, α0)37Ar and Ca 40 (n, α)37Ar reactions in the 8.50-9.50 MeV neutron energy range
Liu J. Jiang H. Cui Z. Hu Y. Bai H. Chen J. Zhang G. Gledenov Y.M. Sansarbayar E. Khuukhenkhuu G. Battsooj N. Krupa L. Chuprakov I. Ruan X. Huang H. Ren J. Fan Q.
November 2022American Physical Society
Physical Review C
2022#106Issue 5
Cross sections of the Ca40(n,α0)Ar37 and Ca40(n,α)Ar37 reactions at five neutron energy points in the 8.50-9.50 MeV energy region were measured. The monoenergetic neutrons were produced through the H2(d,n)3He reaction based on the HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE). A twin gridded ionization chamber (GIC) was used as the charged particle detector. Detailed simulations were performed to determine the nuclear reaction events and detection efficiencies. Present results are compared with existing measurement and evaluation data, which shows that the evaluation data from all libraries are higher than the measurement data in the 8.50-9.50 MeV region for the Ca40(n,α)Ar37 reaction. TALYS-1.9 code was used for theoretical calculations. Calculation results using the TALYS-1.9 code with the adjusted parameters are in agreement with the present measurements, which also show that the compound mechanism predominates the Ca40(n,α)Ar37 reaction in the 8.50-9.50 MeV region. Both present measured forward/backward ratios and TALYS-1.9 calculations suggest that the direct and preequilibrium mechanisms are non-negligible for the Ca40(n,α)Ar37 reaction in the 8.50-9.50 MeV region.
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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
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, Horska 3a/22, Prague 2, 12800, Czech Republic
L. N. Gumilyov Eurasian National University, Nur-sultan, 010000, Kazakhstan
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
Frank Laboratory of Neutron Physics
Nuclear Research Centre
Flerov Laboratory of Nuclear Reactions
Institute of Experimental and Applied Physics
L. N. Gumilyov Eurasian National University
Institute of Nuclear Physics
China Institute of Atomic Energy
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