Monopole oscillations in light nuclei with a molecular dynamics approach
K. Hasnaoui (Tohoku University, Japan)
11h-GANIL - room 105
A coffee will be served 15mn before
The monopole vibrations are collective motions of the nuclei which are characterized by their compression and their dilatation. The monopole vibrations are strongly related to the equation of state of the nuclear matter, and they are usually studied with mean field models at small amplitudes such as the RPA/TDHF models.
We have recently developed a Fermonic Molecular Dynamics (FMD) model [1] and an Antisymmetrized Molecular Dynamics (AMD) model [2] based on Skyrme functionals, and we are interested in testing the capability of such kind of models to investigate the monopole vibrations for a wide range of amplitudes.
In that framework [3], the giant monopole resonance energy in 40Ca is sensitive to the incompressibility of the effective interaction, in good agreement with complete RPA/TDHF calculations. The collective response of 12C, 16O, and 24Mg is also studied. For these lighter nuclei that have an important contribution of an α-clustered component, different frequencies are observed, corresponding to two different types of vibrations associated with breathing and moving of the underlying clusters.
[1] H. Feldmeier and J. Schnack, Rev. Mod. Phys. 72 655 (2000).
[2] A. Ono and H. Horiuchi, Progress in Particle and Nuclear Physics 53 501 (2004).
[3] T. Furuta, K.H.O. Hasnaoui, F. Gulminelli, C. Leclerq, and A. Ono, Phys. Rev. C 82, 034307 (2010).
