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Information × Registration Number 0217U002442, 0112U004494 , R & D reports Title Quasi-free processes and interaction in the final state of many channels in nuclear reactions popup.stage_title Head Pavlenko Yurij, Registration Date 15-02-2017 Organization Scientific Center "Institute for Nuclear Research" of National Academy of Sciences of Ukraine popup.description2 Interim report contains a description of the experimental features of kinematically complete invastigation of three-particle 11B (p, aa)a reaction by using proton beam with energies 2.65 MeV and 3.75 MeV (the tandem generator EPG-10K INR NAS of Ukraine) and the results of the experiment. The data is analyzed to determine the mechanisms of reactions that lead to the appearance of three alpha particles in the initial three channels of particle reactions. Established that in the 11B +, p interaction the dominant interaction mechanism in the investigated areas of phase space is the formation and decay of the intermediate resonances 8Be nucleus, namely ground and first excited state 8Be. Statistical contribution of the formation of three-particle final state reaction can be neglected. Found that the impact on the results of experiments can produce effects of interference amplitudes of resonant interaction in different pairs of a-particles and Coulomb interaction effects with concomitant a-particle in the decay of short living first excited stateof 8Be. From analysis of aa-coicedences spectra obtained values of resonance energies and widths of the ground and first excited states of the nucleus 5He (5Heo.s. - ER = (0,78 ± 0,02) MeV, Г= (0,75 ± 0,16) MeV; 5He * - ER = (2,6 ± 0,3) MeV, Г = (3,5 ± 1,3) MeV), which are within the data errors are consistent with results of R-matrix analysis of na-scattering. Product Description popup.authors Белюскіна Ольга Ол6егівна Горпинич Ольга Костянтинівна Гранцев Вjлодимир Іванович Карлишев Юрій Якович Омельчук Сергій Євгенович Рознюк Юрій Сергійович Руденко Борис Андрійович Слюсаренко Лариса Іваківна Стружко Борис Григорович popup.nrat_date 2020-04-02 Close