Measurement of total cross sections of nuclei produced by 20Ne bombing at 9Be target

The measurement of total reaction cross section is of great importance in studying the structure and reaction mechanisms of exotic nuclei produced by radioactive nuclear beam ( RNB). The measurements of the total reaction cross section of fragments produced by Ne-20 (80MeV/u) + (9) Be(3mm) on Si target at intermediate energies were performed on RIBLL by using the transmission method which is the most convenient and credible method in use. The setting-up of the telescope detectors is introduced. And the experimental procedure and experimental results are also described. From the results, we can see the trends of the total cross sections with neutron number in each nuclear isotope chain. The results for some exotic nuclei predicted by theories, such as N-12, F-17 and Ne-17, are compared with those of their neighbors. And our results show that N-12 has an exotic structure, but F-17 and Ne-17 have not.