Nuclear Dynamics at the Particle Threshold

Key words: 
• microscopic nuclear model /
• density functional theory /
• extended quasiparticle-random-phaseapproximation /
• nucleon-capture reactions /
• stellar nucleosynthesis

Abstract: Recently, new low-energy modes of excitation called pygmy resonances have been observed.Their distinct feature is the close connection to nuclear skin oscillations. A successful description of the pygmy resonances could be achieved in a microscopic theoretical approach which incorporates the density functional theory and QRPA formalism extended with multi-phonon degrees of freedom. The latter is found of crucial importance for the understanding of the fine structure of nuclear electric and magnetic excitations at low energies. Corresponding microscopic multi-phonon response functions are implemented in the studies of s-process of nucleosynthesis.