Naofumi Tsunoda

TL;DR: Novel simple properties of the monopole component of effective nucleon-nucleon interactions are presented, leading to the so-called monopole-based universal interaction, which is shown to change as functions of N and Z, consistent with experiments.

TL;DR: In this article, a newly constructed shell-model Hamiltonian developed from a monopole-based universal interaction was used to reproduce the ground-state energies, energy levels, electric quadrupole properties, and spin properties of boron, carbon, nitrogen, and oxygen isotopes.

TL;DR: The first application of the extended Kuo-Krenciglowa (EKK) theory of the effective nucleon-nucleon interaction to shell-model studies of exotic nuclei, including those where conventional approaches with fitted interactions encounter difficulties, is presented in this article.

TL;DR: In this article, the authors reported the measurement of reaction cross sections (σR}^{ex}) of 27,29,F with a carbon target at RIKEN and attributed the halo to neutrons occupying the 2p 3/2 orbital, thereby vanishing the shell closure associated with the neutron number N=20.

TL;DR: It is shown that the neutron dripline from fluorine to magnesium can be predicted using a mechanism that goes beyond the single-particle picture: as the number of neutrons increases, the nuclear shape assumes an increasingly ellipsoidal deformation, leading to a higher binding energy.