Measurements of Total Reaction Cross Section for Light Nuclei and Evidence for the Anomalous Nuclear Structure in ¹⁵C

Measurements of the total reaction cross section for ^12-16C, ^14-17N and ^16-18O on carbon target at intermediate energies were performed on RIBLL of HIRFL. A larger enhancement of σ_R for ¹⁵C was observed than that for its neighbors. The analysis of these data indicates possible existence of an anomalous nuclear structure in ¹⁵C. A new quantity was suggested as the criterion to distinguish anomalous structure nuclei from normal nuclei.