Measurements of Total Reaction Cross Sections for Exotic NucleiClose to the Proton Drip-line at Intermediate Energies and Observation of a Proton Halo in ²⁷P

Measurements of total reaction cross sections (σ_R) for some proton-rich nuclei (N = 11-15 isotones) on carbon target at intermediate energies have been performed on the Radioactive Ion Beam Line of the Heavy Ion Research Facility in Lanzhou. A large enhancement of σ_R for ²⁷P has been observed than for its neighbors. Evidence for a proton halo in ²⁷P has been revealed in the Glauber analysis of the total reaction cross sections in terms of the difference factor d.