Naofumi Tsunoda

Novel features of nuclear forces and shell evolution in exotic nuclei

Novel simple properties of the monopole component of effective nucleon-nucleon interactions are presented, leading to the so-called monopole-based universal interaction. Shell structures are shown to change as functions of N and Z, consistent with experiments. Some key cases of this shell evolution are discussed, clarifying the effects of central and tensor forces. The validity of the present tensor force is examined in terms of the low-momentum interaction V(lowk) and the Q(box) formalism.

Shell-model study of boron, carbon, nitrogen, and oxygen isotopes with a monopole-based universal interaction

We study boron, carbon, nitrogen and oxygen isotopes with a newly constructed shell-model Hamiltonian developed from monopole-based-universal interaction (

Multi-shell effective interactions

V_{MU}

Shell-model study of spin modes in nuclei and nuclear forces

). The present Hamiltonian can reproduce well the ground-state energies, energy levels, electric quadrupole properties and spin properties of these nuclei in full psd model space including

Effective Hamiltonian in non-degenerate model space

(0-3)\hbar\omega

Tensor force in effective interaction of nuclear force

excitations. Especially, it correctly describes the drip lines of carbon and oxygen isotopes and the spins of the ground states of

Anti-symmetric spin-orbit force in the effective interaction for the shell model and its effect on nuclear structure

^{10}

Hadronic Interaction and Exotic Nuclei

B and

Renormalization persistency of the tensor force in nuclei

^{18}

Exotic neutron-rich medium-mass nuclei with realistic nuclear forces

N while some former interactions such as WBP and WBT fail. We point out that the inclusion of