80MeV/u 20Ne轰击9Be碎裂产物反应总截面的测量

介绍了用透射法测量中能区²⁰Ne打⁹Be靶碎裂产生的次级束与Si靶作用的核反应总截面的方法,以及实验的探测器布局、实验过程和实验结果.并对理论上预言有奇异结构的核¹²N,¹⁷Ne和¹⁷F的实验结果与其相邻核进行了比较.

Measurement of Total Cross Sections of Nuclei Produced by 20 Ne Bombing at 9 Be 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 20Ne (80MeV/u)+ 9Be(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 12N, 17F and 17Ne, are compared with those of their neighbors. And our results show that 12N has an exotic structure, but 17F and 17Ne have not.