Speaker
Prof.
Masayuki Yamagami
(University of Aizu)
Description
We have constructed a new computer code for quasiparticle RPA (QRPA) calculation with Skyrme energy density functional. The matrix QRPA equation is diagonalized by the canonical basis of the Hartree-Fock-Bogoliubov states that break the spatial axial symmetry and the time-reversal symmetry. By using the Fourier-series expansion method, we can reduce the memory size and the computational time of calculations for rotating weakly-bound nuclei.
With this code, we discuss low-frequency quadrupole vibrations of weakly-bound nuclei around 40Mg. These nuclei have quadrupole deformation due to the broken magic number N=28. We emphasize that the coupling to the fluctuation of quadrupole pairing field generates the K=0 mode of quadrupole vibration. Eventually, this mode has strong sensitivity to the collective rotation. The microscopic structure will be clarified.
Primary author
Prof.
Masayuki Yamagami
(University of Aizu)
