POLARIZATION OBSERVABLES IN REACTIONS 9Be(d,po)10Be AND 9Be(d,to)8Be AT THE LOW DEUTERON ENERGIES AND CONTRIBUTION OF THE DIRECT NEUTRON-TRANSFER MECHANISM
V.D. Sarana, N.A. Shlyahov, U.V. Lyashko
Full Text : (1350 kB, Rus.)
Abstract
The possibility of the description of the previously obtained experimental data for angular distributions of the differential cross sections and VAP of the reactions 9Âå(d,po) and 9Âå(d,to),
induced by vector-polarized deuterons with energie from 2,0 to 2,8 MeV, in the framework of DWBA with "measured" optical model parameters in entrance and exit channels without additional
variations is considered. Pairs of the optical potential parameter sets, allowing simultaneously reproduce basic tendency in behaviour pattern of cross section and VAP angular distributions for
9Âå(d,to) and, in addition, proton polarization in 9Âå(d,po) reactions are discovered. Role of the cut-off in radial integrals and influence of nonlocality and finite range corrections are clarified. It
is demonstrated, that predominant mode of these reactions are direct neutron pick-up and stripping. It is possible that characteristic features of the direct process at the low deuteron energies
are determined by peculiarities of the low bounded interacting particles in region of influence of their disintegration thresholds.
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KEY WORDS: nuclear reaction, beryllium, deuteron, stripping, pick-up, cross section, VAP, proton polarization, DWBA, optical potentials.
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