Abstract
The mirror nuclei 12N and 12B are separated by the Radioactive Ion Beam Line in Lanzhou (RIBLL) at HIRFL from the breakup of 78.6 MeV/u 14N on a Be target. The total reaction cross-sections of 12N at 34.9 MeV/u and 12B at 54.4 MeV/u on a Si target have been measured by using the transmission method. Assuming 12N consists of a 11C core plus one halo proton, the excitation function of 12N and 12B on a Si target and a C target were calculated with the Glauber model. It can fit the experimental data very well. The characteristic halo structure for 12N was found with a large diffusion of the protons density distribution.
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