Ядерна фізика та енергетика Nuclear Physics and Atomic Energy   ISSN: 1818-331X (Print), 2074-0565 (Online)   Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine   Languages: Ukrainian, English   Periodicity: 4 times per year   Open access peer reviewed journal

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V. I. Abrosimov, O. I. Davidovskaya

Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine

Abstract: Semiclassical approach based on the solution of the Vlasov kinetic equation for finite two-component systems with a moving surface is generalized for the study of the isovector dipole resp of excited neutron-rich spherical nuclei. The temperature effects are taken into account through the collision integral in the relaxation time approximation. It is shown that, by taking into account the dynamical surface effects, it is possible to obtain an exact treatment of the centre of mass motion for isovector dipole excitations of neutron-proton asymmetric systems. It is found that the width of giant dipole resonance grows with the temperature increase in the approximation of rare collisions between nucleons.

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