Researchers at the Institute of Modern Physics (IMP) of the Chinese Academy of Sciences, together with their collaborators, have achieved the first precise mass measurements of several exotic atomic nuclei. Using this mass data, they have determined the proton dripline for aluminum, phosphorus, sulfur, and argon elements, and proposed a new approach to uncover proton halo structures.
The results were published in Physical Review Letters on November 27.
The atomic nucleus is a quantum many-body system composed of protons and neutrons, typically exhibiting a size similar to that of neighboring nuclei. A halo is an exotic nuclear structure found in weakly bound nuclei, characterized by one or more valence nucleons that display an extended spatial distribution, resulting in a radius significantly larger than that of neighboring nuclei.
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