Compression modes in nuclei and nuclear incompressibility in relativistic models
نویسندگان
چکیده
Using effective lagrangians which correspond to a wide range of values for K1 relativistic RPA calculations are performed for monopole and dipole compression modes in nuclei. It is found that Dirac sea states have an important effect on compression mode energies. Including these negative energy states into relativistic RPA brings the results into general agreement with those of time-dependent relativistic mean field calculations. Comparison with the giant monopole resonance data in Pb indicates that K1 is around 240 MeV. However, the dipole compression mode is predicted above 25 MeV in Pb in strong disagreement with experiment.
منابع مشابه
Isoscalar compression modes in relativistic random phase approximation
A fully consistent relativistic RPA calculation is performed for the monopole and dipole compression modes in nuclei. The emphasis is put on the effects of Dirac sea states which are generally neglected in relativistic RPA calculations. It is found that these effects can be quite important for the isoscalar monopole mode. The main contributions from the pairs of Fermi to Dirac sea states are th...
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