Study of pygmy dipole resonance with a new time-dependent mean field theory

Details Study of pygmy dipole resonance with a new time-dependent mean field theory Study of pygmy dipole resonance with a new time-dependent mean field theory

2011-11-02

arxiv.org/abs/1111.0362v1

Physics

Nuclear Physics

Nuclear Theory

6 pages, 3 figures, Rutherford Centennial Conference on Nuclear Physics conference proceedings

Scientific paper

We carry out a systematic investigation on the low-energy electric dipole strength, which is often called pygmy dipole resonances (PDR), using the canonical-basis time-dependent Hartree-Fock-Bogoliubov (Cb-TDHFB) method. The Cb-TDHFB is a new method which is derived from TDHFB with an approximation analogous to the BCS theory that the pair potential is assumed to be diagonal in the time-dependent canonical basis. We apply the method to linear-response calculation for even-even nuclei. We report the neutron-number dependence of PDR in light (A < 70) and heavy isotopes (A > 100) around N = 82.

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