Ponente
Descripción
The concept of isospin was introduced by Heisenberg, inspired by the striking similarities between protons and neutrons in their behaviour under the strong interaction, playing a pivotal role in advancing our understanding of particle and nuclear physics. However, such symmetry is expected to be only approximate due to the mass difference between protons and neutrons, the Coulomb interaction, and the charge-dependent components of the nuclear force. The isospin symmetry breaking has been widely observed in low-lying excited states between mirror nuclei with the same mass number and exchanged numbers of neutrons and protons. The stunning observation on the violation of the ground state in mirror system T = 3/2 of $^{73}$Kr / $^{73}$Br indicates the continuum effect coupled with states beyond the drip lines and nuclear deformation are crucial for understanding the structure of exotic nuclei. Therefore, this project is aiming at studying isospin symmetry breaking at proton-rich region around A ~ 70 to 80, especially mirror system of $^{76}$Y/$^{76}$Rb, $^{81}$Mo/${^81}$Y and $^{85}$Ru/$^{85}$Nb, at Radioactive Isotope Beam Factory (RIBF) in RIKEN, using WASAbi array surrounded by HPGe detectors.
