부산대학교 도서관

It is well known that the enhancement of halo neutron removal cross sections in neutron halo nuclei. This is one of the evidence for the neutron halo structure. Because the valence neutron of the isomeric state in 16 N is considered to be mainly occupying in the s-orbital, we studied the nuclear structure of 16 N as a candidate for neutron halo nucleus. In this study, we measured one-neutron removal cross sections σ - 1 n using secondary beams of 16 N with a mixture of ground and isomeric states. We used two types of primary beams, 15 N and 18 O, to produce 16 N beams with different isomeric ratios (8.7, 24.2a 16 N beam with a large isomeric ratio is large compared to that obtained with another beam with a small isomeric state. This result suggests that the 16 N isomeric state is considered to have a neutron-halo-like structure. [ABSTRACT FROM AUTHOR]