Speaker
Description
Recent $B\rho$-defined isochronous mass spectrometry experiments have determined the masses of proton-rich nuclei such as $^{23}$Si, $^{26}$P, $^{27}$S, and $^{31}$Ar. These results confirm the bound nature of these isotopes and establish the location of the proton dripline for several isotopic chains. Notably, the measured mirror energy differences (MEDs) exhibit clear deviations from mirror symmetry in P, S, and Ar isotopes, suggesting the presence of extended proton distributions.
Based on these findings, we conducted a systematic theoretical study of MEDs across mirror nuclei, revealing a smooth quadratic dependence on the neutron–proton asymmetry $(N-Z)$. Utilizing this regularity, we made high-precision mass predictions for a series of neutron-deficient nuclei. Furthermore, the predicted masses are consistent with the Isobaric Multiplet Mass Equation (IMME), and the cubic term is found to be negligible, reinforcing the validity of isospin symmetry in this region.
| Research field of your presentation | Experimental high-energy nuclear physics |
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