The first quadrupole excitations in spherical nuclei and nuclear pairing
1 Kurchatov Institute, 123182 Moscow, Russia
2 Moscow Institute of Physics and Technology, 123098 Moscow, Russia
3 Institute for Physics and Power Engineering, 249033 Obninsk, Russia
4 Institut für Kernphysik, Forschungszentrum Jülich, D-52425 Jülich, Germany
a e-mail: email@example.com
Excitation energies and transition probabilities of the first 2+ excitations in even lead, tin and nickel isotopes are calculated within the self-consistent Theory of Finite Fermi Systems based on the Energy Density Functional by Fayans et al. A reasonable agreement with available experimental data is obtained. The effect of the density dependence of the effective pairing interaction is analyzed in detail by comparing results obtained with volume and surface pairing. The effect is found to be noticeable, especially for the 2+-energies which are systematically higher at 200–300 keV for the volume paring as compared with the surface pairing case, the latterbeing in a better agreement with the data.
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