Compression mode giant resonances
نویسندگان
چکیده
Compression mode giant resonances have been measured in many nuclei from C to Pb with inelastic scattering of 240 MeV particles at small angles. Isoscalar monopole distributions have been extracted for 17 nuclei and isoscalar dipole distributions extracted for 11 nuclei. The E0 strength distributions in Zr, Sn, Sm and Pb have been measured precisely and in Sn, Sm and Pb were found to be concentrated in symmetric peaks with the centroid of the strength distributions located at Ex = 16.00 0.07, 15.31 0.11, and 14.24 0.11 MeV respectively. In Zr the E0 distribution was found to have a high energy tail extending up to Ex = 25 MeV. The resulting centroid of the E0 strength for Zr is Ex = 17.89 0.20 MeV. These results and that for Ca lead to Knm = 231 5 MeV by comparing to microscopic calculations using the Gogny interaction.
منابع مشابه
Monopole giant resonances and nuclear compressibility in relativistic mean field theory
Isoscalar and isovector monopole oscillations that correspond to giant resonances in spherical nuclei are described in the framework of time-dependent relativistic mean-field (RMF) theory. Excitation energies and the structure of eigenmodes are determined from a Fourier analysis of dynamical monopole moments and densities. The generator coordinate method, with generating functions that are solu...
متن کاملMonopole giant resonances and nuclear compressibility in relativistic mean eld theory
Isoscalar and isovector monopole oscillations that correspond to giant resonances in spherical nuclei are described in the framework of time-dependent relativistic meaneld (RMF) theory. Excitation energies and the structure of eigenmodes are determined from a Fourier analysis of dynamical monopole moments and densities. The generator coordinate method, with generating functions that are solutio...
متن کاملRelativistic mean-field dynamics of giant resonances
Models based on quantum hadrodynamics provide a consistent description of the nuclear many-body system in terms of interacting baryons and mesons. In the self-consistent mean-field approximation, the time-dependent model has been applied in the analysis of the dynamics of giant resonances. The calculated excitation energies and transition densities of isoscalar giant monopole resonances, restri...
متن کاملDeducing the nuclear matter incompressibility coefficient from data on isoscalar compression modes
Accurate assessment of the value of the incompressibility coefficient, K, of symmetric nuclear matter, which is directly related to the curvature of the equation of state (EOS), is needed to extend our knowledge of the EOS in the vicinity of the saturation point. We review the current status of K as determined from experimental data on isoscalar giant monopole and dipole resonances (compression...
متن کاملShell Effects and the Fluid Dynamical Model for Nuclear Giant Resonances
We discuss the fluid dynamical approach to nuclear giant resonances using imposed scahng type oscillations. We calculate the response of the intrinsic kinetic energy to the lsoscalar twist mode (a rrr = 2) quantum mechanically and show that for thxs mode as well as for the lowest normal parity modes (a rrr = 0 +, 1and 2+), the static single particle effects lead to the same restoring forces as ...
متن کامل