Core Insights - The research team from the Institute of Modern Physics of the Chinese Academy of Sciences has made significant progress in the study of rare decay modes of atomic nuclei, successfully observing the new nuclide aluminum-20 and its decay through a rare three-proton emission mode [1][2] Group 1: Research Findings - Over 3,300 nuclides have been discovered, with fewer than 300 being stable nuclides found in nature; the rest are unstable and undergo radioactive decay [1] - The study utilized the fragment separator at the Helmholtz Institute and employed in-flight decay experimental techniques to measure the angular correlations of decay products from aluminum-20 [2] - Aluminum-20 is the lightest aluminum isotope discovered experimentally, located outside the proton drip line and lacking seven neutrons compared to stable aluminum isotopes [2] Group 2: Theoretical Implications - The research team applied the Gamow shell model and Gamow coupling method for theoretical calculations, successfully reproducing the measured decay energy of aluminum-20 and predicting its ground state spin-parity [2] - The study explored the isospin symmetry between aluminum-20 and its mirror nucleus nitrogen-20, revealing a breaking of this symmetry, which is significant for nuclear structure research [2]

Core Insights - The research team at the Max Planck Institute for Nuclear Physics (MPIK) in Germany has made a significant advancement in the field of neutrino detection by successfully detecting neutrino scattering effects using a small detector weighing less than 3 kilograms [1] Group 1 - The successful detection of neutrino scattering represents a key milestone in neutrino detection technology [1]

Core Insights - The research team from the Institute of Modern Physics, Chinese Academy of Sciences, successfully measured the mass of the rare neutron-deficient nucleus silicon-22, discovering that the proton number 14 is a new magic number [1][2] Group 1: Research Findings - The team utilized an improved magnetic rigidity identification technique at the Lanzhou Heavy Ion Accelerator Cooling Storage Ring to measure the ground state mass of silicon-22, enhancing the precision of previous measurements of silicon-23 by nearly seven times [2] - The new mass data revealed the existence of the new proton magic number 14 in silicon-22, supported by advanced nuclear theoretical models [2] - The study found that while silicon-22 exhibits a double magic characteristic similar to oxygen-22, there is a slight symmetry breaking in its structure compared to oxygen-22 [2] Group 2: Historical Context - Magic numbers are specific numbers of protons or neutrons that confer stability to atomic nuclei, with known magic numbers including 2, 8, 20, 28, 50, 82, and 126 [1] - The concept of magic numbers was introduced in the 1940s and 1950s by physicists such as Mayer and Jensen, who received the Nobel Prize in Physics in 1963 for their work on the shell model of atomic nuclei [1]