The large branching ratio observed in the $\beta$-delayed proton emission of $^{11}$Be was explained with the existence of a narrow near-threshold proton emitting resonance in $^{11}$B. The direct measurement of this process raised a heated debate around the properties of this resonance and the unusually large $\beta$-decay
branching ratio populating it. Since then, there were several...
Nuclear resonant states far from the stability line provide a stringent test of nuclear forces at extreme isospin asymmetry. In this talk, I will report on the low-lying resonant states of extremely neutron-rich $^{9}$He and $^{10}$He populated via the (p, 2p) reaction from the 2n-halo nucleus $^{11}$Li at ~250 MeV/nucleon. The obtained $^{9}$He spectrum shows a clear peak at 1.2 MeV with a...
The ratio method [1-3] is a novel method to extract important structural information of halo nuclei, such as binding energies and ANCs (Asymptotic Normalizing Coefficients). It is based on the Recoil Excitation Breakup (REB) model [4], which predicts that the uncertainty of halo structures related to the reaction dynamics is strongly reduced by taking the ratio of angular distributions for...
The Gamow-Teller Giant Resonance in $^{11}$Li was measured via the $^{11}$Li(p,n)$^{11}$Be charge-exchange reaction at 182 MeV/u in inverse kinematics at the RIKEN Radioactive Isotope Beam Factory. There is no available data for isovector spin-flip giant resonances in nuclei with large isospin asymmetry factors, where (N−Z)/A > 0.25 [1]. Our work aims to investigate this unexplored region,...
The latest generation of radioactive ion beam facilities provides unparalleled access to neutron-rich unstable isotopes. One of the areas of active investigation is the study of the shell evolution near the neutron magic numbers N=20 [1-4] and N=28 [5-6] for such unstable nuclei. The nuclei near these magic numbers display exotic structural features such as dampening of shell gaps, formation...