Effect of proton-proton Coulomb repulsion on soft dipole excitations of light proton-rich nuclei

Details Effect of proton-proton Coulomb repulsion on soft dipole excitations of light proton-rich nuclei Effect of proton-proton Coulomb repulsion on soft dipole excitations of light proton-rich nuclei

2011-09-14

arxiv.org/abs/1109.2994v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure, 1 table

Scientific paper

We perform three-body model calculations for soft dipole excitations of the proton-rich Borromean nucleus $^{17}$Ne. To this end, we assume that $^{17}$Ne takes the $^{15}$O+p+p structure, in which the two valence protons are excited from the $0^+$ ground state configuration to $1^-$ continuum states. We employ a density-dependent contact force for the nuclear part of the pairing interaction, and discretize the continuum states with the box boundary condition. We show by explicitly including the Coulomb interaction between the valence protons that the Coulomb repulsion does not significantly alter the E1 strength distribution. We point out that the effect of the Coulomb repulsion in fact can be well simulated by renormalizing the nuclear pairing interaction.

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