Study of the Structure of Borromean Nucleus ¹⁷Ne

In the present research, we used the ¹⁷Ne beam at 30.8 MeV/u to bombard the 43 mg/cm^{2 12}C target and measured the angular correlations between the fragments and emitted proton. In the break-up reaction of ¹⁷Ne, one-proton knockout would result in an unstable nucleus 16F, which would further decay by the proton emission. The measured angular correlation between the ¹⁶F momentum and the relative momentum of its decay products was compared with theoretical calculations and indicated that the valence proton in 17Ne has the most probability to be situated in the s1/2 orbital with a small admixture of the d5/2 orbital. The present results suggest that ¹⁷Ne has a halo structure.