The two-proton radioactivity (2p decay) is an exotic decay mode predicted theoretically in the 1960s and first discovered experimentally in 2002. Two protons are simultaneously emitted from the ground state of some neutron-deficient nuclei such as 19Mg, 45Fe, 48Ni, and 54Zn.
Because the two-proton emitters are very undatable, it is challenging to study their energy structure and the mechanism...
Although currently extended to element 118, the periodic table of the elements is still far from reaching the end. Search for the Island of Stability has been one of the most attractive problems. The existence of the Island of Stability is predicted based on the Shell Model lighter than Pb, thus energies of single-particle levels require further confirmation when extrapolating to the Super...
Among open-shell nuclei, systematic difference is found in ground-state energies between odd-even and even-even nuclei.
This is because the pairing interaction lowers the ground-state energy of even-even nuclei.
If we focus on the second-order terms of expansion of the ground-state energy with respect to the neutron number difference from one nuclide, nuclei in an isotopic chain may form a...
The equation of state of nuclear matter (EOS) plays an important role not only in nucleus but also in extreme quantum systems such as neutron stars. Incompressibility of symmetric nuclear matter ($K_0$) and isospin dependence ($K_\tau$) are the parameters of EOS, and they can be extracted from the nuclear incompressibility $K_A$ measured from the isoscalar giant monopole resonance...
The energy density functional method is able to provide systematic analysis on properties of nuclei all over the nuclear chart.
We perform the calculations for nuclei from the proton to the neutron drip lines including superheavy nuclei.
Using HFBTHO program(Axially deformed solution of the Skyrme-Hartree–Fock–Bogoliubov equations using the transformed harmonic oscillator basis (II)), the...
Shape evolution from spherical to deformed nuclear system is being studied to reveal the effect of nuclear interactions as an increase of neutron number in finite quantum many-body system. Neutron-rich odd Xe nuclei with $A$ ~ 140 are located at the northeast transitional-mass region of the doubly-magic $^{132}$Sn ($Z$ > 50 and $N$ > 82). Various nuclear structure with prolate collectivity and...
Nuclear charge radius is one of the most fundamental quantities in describing the structure of a nucleus. So far, the elastic electron scattering experiments have provided information on the charge distribution of stable and quasi-stable nuclei. Now, there are new methods available to measure the charge radius in unstable nuclei of shorter life times. Furthermore, precision in the isotope...
$^{11}$Li nucleus is one of the flagship drip-line nuclei in the field of nuclear physics. A spatially extended structure of neutrons in $^{11}$Li, which is now widely known as “halo” structure, opened the very active field of research with unstable nuclear beams. $^{11}$Li have the nature of Borromean.[1] In many cases, $^{11}$Li is considered as a 3-body system of $^{9}$Li + 2 neutrons....
