ISOVECTOR DIPOLE GIANT-RESONANCES - A RELATIVISTIC VLASOV EQUATION APPROACH

In the framework of relativistic quantum hadron dynamical theory under semiclassical, approximation and taking the vacuum fluctuation into a ccount, a relativistic Vlasov equation (RVE) has been derived. Using R VE and considering other relativistic effects, we have studied the iso vector dipole giant resonances built on ground state in spherical nucl ei. The main results shown that the resonance energies for each multip ole are larger than those obtained from the non-relativistic classical Vlasov approach. But by means of choosing a reasonable symmetry poten tial as 100 MeV, the relativistic results can fit the experimental res ults very well.