Study of $^{6}$He+$^{12}$C Elastic Scattering Using a Microscopic Optical Potential

Details Study of $^{6}$He+$^{12}$C Elastic Scattering Using a Microscopic Optical Potential Study of $^{6}$He+$^{12}$C Elastic Scattering Using a Microscopic Optical Potential

2010-07-23

arxiv.org/abs/1007.4123v1

Physics

Nuclear Physics

Nuclear Theory

12 pages, 9 figures, accepted for publication in Physical Review C

Scientific paper

The $^6$He+$^{12}$C elastic scattering data at beam energies of 3, 38.3 and 41.6 MeV/nucleon are studied utilizing the microscopic optical potentials obtained by a double-folding procedure and also by using those inherent in the high-energy approximation. The calculated optical potentials are based on the neutron and proton density distributions of colliding nuclei established in an appropriate model for $^6$He and obtained from the electron scattering form factors for $^{12}$C. The depths of the real and imaginary parts of the microscopic optical potentials are considered as fitting parameters. At low energy the volume optical potentials reproduce sufficiently well the experimental data. At higher energies, generally, additional surface terms having form of a derivative of the imaginary part of the microscopic optical potential are needed. The problem of ambiguity of adjusted optical potentials is resolved requiring the respective volume integrals to obey the determined dependence on the collision energy. Estimations of the Pauli blocking effects on the optical potentials and cross sections are also given and discussed. Conclusions on the role of the aforesaid effects and on the mechanism of the considered processes are made.

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