Intruder-driven mirror energy differences between 29Cl and 29Mg studied with antisymmetrized molecular dynamics
Year: 2026
Type: article
Abstract: To clarify the mirror energy differences (MEDs) of the proton-unbound nucleus 29 Cl and their microscopic origins, we investigate the low-lying states of the 29 Cl– 29 Mg mirror pair using antisymmetrized molecular dynamics. The calculation reasonably reproduces the normal and intruder states of 29 Mg, while suggesting alternative spin-parity assignments for 29 Cl. The 1 / 2 + and 3 / 2 + states are predicted to form a nearly degenerate ground-state doublet with a small MED because of their similar intrinsic structures. In contrast, the 3 / 2 − and 7 / 2 − intruder states exhibit large negative MEDs and are assigned to the observed resonances at approximately 500 keV and 1.1 MeV, respectively. Their large MEDs originate from the reduced Coulomb energies associated with the stronger deformation and spatially extended proton distributions in the intruder configurations.
Source: Physics Letters B
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: National Research Foundation, Korea Basic Science Institute, National Research Foundation of Korea, Institute for Basic Science, Ministry of Science and ICT, South Korea, Chung Mong-Koo Foundation, Japan Society for the Promotion of Science, National Supercomputing Center, Korea Institute of Science and Technology Information
OpenAlex ID: W7171852295