Nuclear Shell Structure Directly Influences Short-Range-Correlated Nucleon Pair Formation

Researchers have identified a direct link between the internal shell structure of atomic nuclei and the formation of short-range-correlated (SRC) nucleon pairs. The study reveals that protons and neutrons momentarily cluster together with high relative momentum based on the specific arrangement of their quantum energy levels within the nucleus.

These findings clarify how the shell model—a framework describing the distribution of protons and neutrons in discrete energy states—influences the behavior of these fleeting nucleon pairs. When nucleons occupy specific shells, they exhibit distinct pairing patterns that dictate their interactions at short distances. By analyzing these high-momentum correlations, scientists observed that the probability of pair formation changes depending on the orbital configuration of the nucleons. This data provides a clearer picture of the forces governing nuclear matter and explains how the internal architecture of the atom shapes the movement and interaction of its constituent particles.

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Date: June 4, 2026