Three-body Thomas-Ehrman shifts of analog states of 17Ne and 17N
E. Garrido, D. V. Fedorov, A. S. Jensen
Abstract
The lowest-lying states of the Borromean nucleus 17Ne (15O+p + p) and its mirror nucleus 17N (15N+n + n) are compared by using the hyperspheric adiabatic expansion. Three-body resonances are computed by use of the complex scaling method. The measured size of 15O and the low-lying resonances of 16F (15O+p) are first used as constraints to determine both central and spin-dependent two-body interactions. The interaction obtained reproduces relatively accurately both experimental three-body spectra. The Thomas-Ehrman shifts, involving excitation energy differences, are computed and found to be less than 3% of the total Coulomb energy shift for all states.
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