Year: 2026
Type: article
Abstract: Islands of inversion occur when the nuclear ground state is dominated by intruder configurations, specifically particle-hole excitations across shell gaps, rather than by the naive spherical shell-model expectation of filled shell configurations. Using the realistic and rigorous no-core shell model, we are able to confirm that deformation drives these intruder states in the light halo nuclides $^{11}$Li and $^{29}$F. In small model spaces, these deformed intruders lie high in energy with respect to spherical normal states; as the model space size increases, the intruders energetically approach, albeit slowly, the normal states. This provides further strong evidence of the connection between shape deformation/coexistence and islands of inversion, as well demonstrating as the computational challenges in rigorously modeling this phenomenon. Our results also suggest halo states can be strongly deformed and/or strongly mixed with normal spherical states.
Source: Physical Review C
DOI: 10.1103/csgd-ncnj
Authors: Calvin W. Johnson, Mark A. Caprio, Shwetha L. Vittal
Institutions: San Diego State University, University of Notre Dame
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1131943172, G1286236842, NUCLEAR ASTROPHYSICAL PROBES OF MATTER AT HIGHT TEMPERATUREAND DENSITY, G1677143136, G222768804, G2821925151, G3083819904, G42916606, G4501827968, G4518967140, G498139845, COMPUTATIONAL APPROXIMATIONS TO THE NUCLEAR SHELL MODELL, G5076365615, NUCLEAR ASTROPHYSICAL PROBES OF MATTER AT HIGHT TEMPERATUREAND DENSITY, G6652958823, G7068633974, COMPUTATIONAL APPROXIMATIONS TO THE NUCLEAR SHELL MODELL, MEAN-FIELD AND MOMENT METHODS APPLIED TO NUCLEAR STRUCTURE AND REACTIONS, NUCLEAR PROPERTIES AT EXTREME DENSITY, TEMPERATURE, SPIN AND ISOSPIN, G9000923594, G969889393
OpenAlex ID: W4415936585