Abstract
The amplitude for the consecutive transfer of two protons in A(X, Y)B peripheral nuclear reactions induced by loosely bound light (exotic) nuclei and described by a nonrelativistic square Feynman diagram in which the first transferred proton is loosely bound while the second one in tightly bound is considered. It is shown that the inclusion of three-ray Coulomb vertex effects in the square diagram leads to the appearance of an additional “Coulomb” singularity in the variable cos θ (here, θ is the c.m. scattering angle), this singularity being closer to the physical domain, −1 ≤ cos θ ≤ 1, than the well-known “triangle” singularities corresponding to the amplitude of the square diagram in which the internal line is contracted. The asymptotic behavior of the partial-wave amplitudes for l ≫ 1 that are generated by the aforementioned singularities is found explicitly. A comparative analysis of the resulting partial-wave amplitudes for l ≫ 1 is performed for specific peripheral nuclear reactions induced by 8B and 12N ions at various energies.
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Original Russian Text © L.D. Blokhintsev, A.M. Mukhamedzhanov, D.Kh. Tadzhibaeva, R. Yarmukhamedov, 2010, published in Yadernaya Fizika, 2010, Vol. 73, No. 7, pp. 1161–1180.
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Blokhintsev, L.D., Mukhamedzhanov, A.M., Tadzhibaeva, D.K. et al. Influence of vertex coulomb effects on peripheral partial amplitudes for the consecutive transfer of two protons in A(X,Y)B peripheral nuclear reactions induced by light loosely bound (exotic) nuclei at low energies. Phys. Atom. Nuclei 73, 1122–1141 (2010). https://doi.org/10.1134/S1063778810070069
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DOI: https://doi.org/10.1134/S1063778810070069