Cluster structures within Fermionic Molecular Dynamics
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چکیده
Cluster structures within Fermionic Molecular Dynamics T. Neff, H. Feldmeier Gesellschaft für Schwerionenforschung mbH, Planckstraße 1, 64291 Darmstadt, Germany The many-body states in an extended Fermionic Molecular Dynamics approach are flexible enough to allow the description of nuclei with shell model nature as well as nuclei with cluster and halo structures. Different many-body configurations are obtained by minimizing the energy under constraints on collective variables like radius, dipole, quadrupole and octupole deformations. In the sense of the Generator Coordinate Method we perform variation after projection and multiconfiguration calculations. The same effective interaction derived from realistic interactions by means of the Unitary Correlation Operator Method is used for all nuclei. Aspects of the shell model and cluster nature of the ground and excited states of 12C are discussed. To understand energies and radii of neutron-rich He isotopes the soft-dipole mode is found to be important. 1. FERMIONIC MOLECULAR DYNAMICS In the Fermionic Molecular Dynamics (FMD) model [ 1] the A-body state is given as a Slater determinant ∣
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