Bochum 2009 – wissenschaftliches Programm
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HK: Fachverband Hadronen und Kerne
HK 59: Nuclear Structure and Dynamics II
HK 59.4: Vortrag
Mittwoch, 18. März 2009, 17:30–17:45, H-ZO 50
The optical potential for the subbarrier elastic scattering of light weakly-bound deuteron-like nuclei — •Lesya Borowska1,2, Kostyantyn Terenetsky2, Volodymyr Verbitsky2, and Stephan Fritzsche3,4 — 1Universität Bonn, Auf dem Hügel 20, D-53121 Bonn, Germany — 2Institute for Nuclear Research, National Academy of Sciences of Ukraine, Nauky Prospekt 47, 03680 Kyiv, Ukraine — 3Gesellschaft für Schwerionenforschung (GSI), Planckstrasse 1, D-64291 Darmstadt, Germany — 4Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany
The elastic scattering of light weakly-bound deuteron-like nuclei in the field of heavy targets has been studied for collision energies below and near the Coulomb barrier. Based on the assumption that the deuteron-like nucleus follows the projectile adiabatically along its classical trajectory [1], an analytical expression for the optical potential is derived which describes both, the (electrical) polarization as well as the breakup of the projectile in the field of the target. Detailed computations with this optical potential have been carried out for the elastic scattering of 6He + 208Pb at energies 14 MeV and 16 MeV near to the Coulomb barrier. It is demonstrated that the polarization of the weakly-bound deuteron-like nucleus leads to a clear decrease of the (elastic) scattering cross section in excellent agreement with a recent measurement by Sanchez-Benitez et al. [Nucl. Phys. A 803, 30 (2008)]
[1] L. Borowska, K. Terenetsky, V. Verbitsky, S. Fritzsche, Phys. Rev. C 76, 034606 (2007)