Quadrupole moment and a proton halo structure in 17F (I?= 5/2+).

The quadrupole moment of light nuclei 17F in the ground state (I?= 5/2+) is measured by the ?-NMR method. The effective charge of the last proton in a d5/2orbit for 17F is extracted from the measured quadrupole moment Q(17F) divided by the quadrupole moment Qspcalculated with a single particle model. A proton effective charge of eeffp= 1.12 ± 0.07eis obtained, which is in agreement with that given by a particle-vibration coupling model calculation within the experimental error. The present value of the proton effective charge is strong evidence for the existence of a proton skin in 17F (I?= 5/2+). [ABSTRACT FROM AUTHOR]