Experimental study of the energy dependence of the total cross section for the {sup 6}He + {sup nat}Si and {sup 9}Li + {sup nat}Si reactions

• Published in: Physics of particles and nuclei 2017-11, Vol.48 (6)
• Main Authors: Sobolev, Yu. G., National Research Center Kurchatov Institute, Moscow, Penionzhkevich, Yu. E., National Research Nuclear University MEPhI, Moscow, Aznabaev, D., Institute of Nuclear Physics, Almaty, Zemlyanaya, E. V., Ivanov, M. P., others, and
• Format: Article
• Language: English
• Subjects: ENERGY DEPENDENCE; FOLDING MODEL; HELIUM 6; LITHIUM 9; NUCLEAR PHYSICS AND RADIATION PHYSICS; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; TOTAL CROSS SECTIONS
• ISSN: 1063-7796; 1531-8559
• DOI: 10.1134/S1063779617060545

New experimental measurements of the total reaction cross sections for the {sup 6}He + {sup nat}Si and {sup 9}Li + {sup nat}Si processes in the energy range of 5 to 40 A MeV are presented. A modified transmission method based on high-efficiency detection of prompt n–γ radiation has been used in the experiment. A bump is observed for the first time in the energy dependence σ{sub R}(E) at E ∼ 10–30 A MeV for the {sup 9}Li + {sup nat}Si reaction, and existence of the bump in σ{sub R}(E) at E ∼ 10–20 A MeV first observed in the standard transmission experiments is experimentally confirmed for the {sup 6}He + {sup nat}Si reaction. Theoretical analysis of the measured {sup 6}He + {sup nat}Si and {sup 9}Li + {sup nat}Si reaction cross sections is performed within the microscopic double folding model. Disagreement is observed between the experimental and theoretical cross sections in the region of the bump at the energies of 10 to 20 A MeV, which requires further study.