Coulomb Shift in Two-Center Cluster Systems

Abstract

Coulomb shift is analyzed for the mirror cluster systems of 18 O = α + 14 C and 18 Ne = α + 14 O by applying the orthogonality condition model (OCM). The OCM calculation clearly predicts the suppressed excitation energy of the higher 0 + states in the proton-rich system of 18 Ne. This results can be interpreted in terms of the extension of the Thomas-Ehrman shift (TES), which is discussed in 17 O = 16 O + N and 17 F = 16 O + P, to the cluster degrees of freedom.