DREB Conference 2024

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 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...

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...