Study of High Energy Light Ion Reaction with Antisymmetrized Molecular Dynamics

该研究项目从1995年到1997年进行了三年。本项目主要研究高能轻离子引发的两类反应过程，并采用反对称分子动力学（AMD）理论分析。我们研究的一类反应过程是（p，p '）、（p，n）或（^3He，t）中的准自由弹性散射或Δ-空穴激发。另一种反应过程是所谓的轻离子弹靶碎裂。本三年研究计划的前半部分主要致力于第一种反应过程的研究，并取得了许多丰硕的成果，而包括今年在内的三年后半部分主要致力于第二种反应过程的研究。对第一类反应过程的研究，成功地再现了许多实验数据，对阐明预平衡反应作出了重大贡献。 ...更多信息 n机制。此外，对质子反应截面的分析为我们提供了核介质中两核子碰撞截面的重要信息。在第二类反应过程的研究中，我们通过分析质子注入^ C核的碎裂反应，研究了轻离子轰击靶的碎裂过程<12>。这一分析是通过与注入^ N的^ C核碎裂反应进行比较而作出<12><14>的。此外，除了与重离子诱发碎裂的比较外，我们还比较了质子诱发^<12>C核碎裂和^4He诱发^<12>C核碎裂。我们发现质子诱导碎裂和重离子诱导碎裂之间存在很大的差异，并阐明了这种差异的原因。碎裂反应的研究为利用碎裂反应研究丰中子硼同位素的结构提供了动力。丰中子硼同位素碎裂研究的结果有力地表明了碎裂反应对检验丰中子硼同位素团簇结构的有用性。少

This research project was advanced for three years from 1995 to 1997. The project was on the study of two kinds of reaction processes induced by high energy light ions, for which the theoretical analyzes with antisymmetrized molecular dynamics (abbreviated to AMD) are utilized. One kind of reaction process we studied was such type of reaction process like quasi-free elastic scattering or DELTA-hole excitation in (p, p') , (p, n) , or (^3He, t) . The other kind of reaction process was the so-called target fragmentation by light ion projectiles, The former half of the present three-year research project was devoted mainly to the study of the first kind of reaction process with many fruitful results, while the latter half of three years including this year was devoted mainly to the study of the second kind of reaction process. The study of the first kind of reaction process succeeded in reproducing many experimental data and made a big contribution in clarifying the preequilibrium reactio … More n mechanism. Furthermore, analyzes of reaction cross sections of proton induced reactions gave us important information on the two-nucleon collision cross sections in nuclear medium. In the study of the second kind of reaction process, we investigated the target fragmentation by light ion projectiles, by analysing the fragmentation reaction of ^<12>C nucleus by proton injection. This analysis was made by comparing with the fragmentation reaction of ^<12>C nucleus by ^<14>N injection. Furthemore, in addition to the comparison with heavy-ion induced fragmentation, we also compared the proton induced fragmentation of ^<12>C nucleus with the ^4He induced fragmentation of ^<12>C nucleus. We found large difference between proton induced fragmentation and heavy-ion induced fragmentation and clarified the reason of this difference. This study of the fragmentation reaction gave the motivation to the study of the structure of the neutron-rich Boron isotopes by the use of fragmentation reaction. The results of the fragmentation study of the neutron-rich Boron isotopes strongly suggested the usefulness of the fragmentation reaction for checking the clustering structure of the neutron-rich Boron isotopes. Less