Thomas-Ehrman effect in a three-body model: ¹⁶Ne case

الأصل · EN

The dynamic mechanism of the Thomas-Ehrman shift is studied in three-cluster systems by example of ¹⁶Ne and ¹⁶C isobaric mirror partners. We predict configuration mixings for 0+ and 2+ states in ¹⁶Ne and ¹⁶C. Large isospin symmetry breaking on the level of wave function component weights is demonstrated for these states and discussed as three-body mechanism of Thomas-Ehrman shift. It is shown that the description of the Coulomb displacement energies requires a consistency among three parameters: the ¹⁶Ne decay energy Eₜ, the ¹⁵F ground state energy Eᵣ, and the configuration mixing parameters for the ¹⁶Ne/¹⁶C 0+ and 2+ states. Basing on this analysis we infer the ¹⁵F 1/2+ ground state energy to be Eᵣ=1.39-1.42 MeV.