Monopole oscillations in light nuclei with a molecular dynamics approach

Details Monopole oscillations in light nuclei with a molecular dynamics approach Monopole oscillations in light nuclei with a molecular dynamics approach

2010-06-16

arxiv.org/abs/1006.3267v2

Physics

Nuclear Physics

Nuclear Theory

10 pages, 8 figures

Scientific paper

Collective monopole vibrations are studied in the framework of an antisymmetrized version of molecular dynamics as a function of the vibration amplitude. The giant monopole resonance energy in ${}^{40}Ca$ is sensitive to the incompressibility of the effective interaction, in good agreement with complete time-dependent Hartree-Fock calculations. The collective response of ${}^{12}C$, ${}^{16}O$ and ${}^{24}Mg$ is also studied. For these lighter nuclei that have an important contribution of an $\alpha$-clustered component, different frequencies are observed, corresponding to two different types of vibrations associated with breathing and moving of the underlying clusters. Possible connections with direct breakup into $\alpha$ clusters at high excitation energy are discussed.

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