Investigating the nuclear fusion and nucleon transfer channels in the 197Au + 6He reaction at 6He energies up to 20 MeV/A

• Published in: Bulletin of the Russian Academy of Sciences. Physics 2013-04, Vol.77 (4), p.360-365
• Main Authors: Skobelev, N. K., Penionzhkevich, Yu. E., Kulko, A. A., Demekhina, N. A., Kroha, V., Kugler, A., Lukyanov, S. M., Mrázek, J., Sobolev, Yu. G., Maslov, V. A., Muzychka, Yu. A., Voskoboynik, E. I., Fomichev, A. S.
• Format: Article
• Language: English
• Subjects: Atomic Energy; Hadrons; Heavy Ions; Nuclear Physics; Nuclear Technology (The 61st International Meeting on Nuclear Spectroscopy and Nuclear Structure); Physics; Physics and Astronomy; Proceedings of the International Conference “Nucleus-2012. Fundamental Problems of Nuclear Physics
• ISSN: 1062-8738; 1934-9432
• DOI: 10.3103/S106287381304028X

New data on the cross sections of reactions that proceed during the interaction of 6 He and 197 Au nuclei in the 6 He energy range of 40 to 120 MeV are reported. The experiments were performed using the secondary beam of the ACCULINNA separator at the Flerov Laboratory of Nuclear Reactions (FLNR), JINR. Reaction products are identified by means of activation method to measure the gamma activity of a thin-foil target assembly. Excitation functions for 6 He fusion reactions with subsequent emission of up to 10 neutrons from the compound nucleus are measured. Cross sections for reactions with emission of charged particles and nucleon transfer were also measured. The experimental cross sections for the ( 6 He, x n) reactions that proceed via the formation of a compound nucleus agree in general with calculations using models that involve the statistical approach. It is shown that the complete fusion reaction cross section drops slightly up to an energy of 114 MeV. The experimental excitation functions for the reactions resulting in the formation of mercury and gold isotopes indicate that the main contribution to their formation comes from direct processes, while the evaporation reactions ( 6 He, p x n) and ( 6 He, α x n) are of minor importance.