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用核化学技术测定了135MeV/u12C和铁相互作用中的靶余核的生成截面,通过高斯电荷分布函数得到了靶余核的质量分布.与46MeV/u12C+Cu相比,发现A<30质量区的产额明显增加,且产物有偏向丰中子一侧的趋势.实验测定的质量分布与熔合碎裂模型和级联两体模型的计算结果进行了比较,结果似乎表明在很高入射能情况下多重碎裂衰变是A<30靶余核生成的主要反应机制.
The nucleation technique was used to determine the cross section of the target nucleus in the interaction between 135MeV / u12C and iron. The mass distribution of target nuclei was obtained by Gaussian charge distribution function. Compared with 46MeV / u12C + Cu, it was found that the yield of A <30 mass region increased significantly, and the product tended to favor the abundance neutron side. The experimental mass distribution was compared with the results of the fusion and fragmentation models and the cascade two-body model. The results seem to indicate that multiple fragmentation and decay are the main reaction mechanisms for the A <30 target nucleus formation at very high incident energies.