An application of the extended TDHF method to the 0+ intruder states in even Pb nuclei

As an application of extended TDHF method, the excitation energies of low-lying 0+ intruder states in even-even nuclei are studied. System treated in this paper is schematic one, i.e., the shell-model in which protons move in two single-particle levels and neutrons in a single-particle level. The Hamiltonian consists of the proton pairing interaction and the proton-neutron quadrupole interaction. The system is transcribed in classical mechanics and, after certain approximation, requantized. The intruder states very naturally appear within an aligned coupling scheme for the neutrons. Besides a theoretical study of eigenvalues and eigenvectors describing a few proton particle-hole excitations, an application to the Pb region is given. (author)