Total cross sections for 4,6He + 28Si reactions measured at 10–28 MeV/A |
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| Authors: | I V Kuznetsov E Byalkowski M P Ivanov R Kalpakchieva A Kugler I N Kukhtina V F Kushniruk V A Maslov L Mikhailov F Negoita Yu E Penionzhkevich N O Poroshin N K Skobelev V I Smirnov Yu G Sobolev V Yu Ugryumov |
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| Institution: | (1) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia;(2) Institute of Nuclear Physics, Krakow, Poland;(3) Nuclear Physics Institute, Řež, CZ-250 68, Czech Republic;(4) Institute of Atomic Physics, Bucharest, Romania;(5) Moscow State Engineering Physics Institute, Technical University, Kashirskoe sh. 31, Moscow, 115409, Russia |
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| Abstract: | New results on the energy dependence of the total cross section (σ R) for 6He scattering on 28Si in the incident energy range 10–28 MeV/A are obtained. The α-particle-production cross sections for the 28Si(6He, 4He)X channel are measured as well. The secondary beam of 6He with an intensity of up to 5×104 particle/s was generated by bombarding a thick beryllium target with ～32-MeV/A 7Li ions. In the energy region below 17 MeV/A, σ R increases sharply. The experimental dependences of the total cross sections are compared with the results of σ R calculations using the double-folding potential within the optical model. The energy dependence of σ R for 6He differs from that for the neighboring nuclei, which can be associated with the structural features of the former nucleus. The energy spectra of α particles produced in the 6He interactions with silicon indicate two mechanisms of their production: transfer reaction and 6He breakup in the field of the 28Si nucleus. |
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