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首页> 外文会议>AIP Conference Proceedings vol.865; China-Japan Joint Nuclear Physics Symposium; 20060516-20; Shanghai(CN) >Effects of Breakup of Weakly Bound Projectile and Neutron Transfer on Fusion Reactions
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Effects of Breakup of Weakly Bound Projectile and Neutron Transfer on Fusion Reactions

机译：弱束缚弹丸的破裂和中子转移对聚变反应的影响

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摘要

The excitation functions of elastic and quasielastic scattering at backward angles are measured for the systems ~(16)O + ~(152)Sm, ~(6,7)Li + ~(208)Pb. The barrier distributions are extracted from these measured excitation functions and compared with the corresponding fusion barrier distributions. Except some details, the barrier distributions derived from the data of fusion and elastic/quasielastic scattering are almost the same for the tightly bound reaction systems. For the reaction systems with weakly bound projectile, the barrier distributions extracted from quasielastic scattering are obviously different the fusion barrier distributions. However, the barrier distributions extracted from the excitation functions of the quasielastic scattering plus breakup are almost the same as the one extracted from the complete fusion data. This result means that barrier distribution not only bears the information of nuclear structures but also contains the knowledge of reaction mechanisms. In addition, the measured barrier distribution of ~(32)S + ~(96)Zr is flat and extends to lower energy due to the coupling of neutron transfer with positive Q-values, which will result in a significant enhancement of fusion cross sections at the subbarrier energies. However, our results show that the complete fusion of the weakly bound projectile with heavy target is suppressed at the above barrier energies as compared with the model predictions.
机译：对于〜（16）O +〜（152）Sm，〜（6,7）Li +〜（208）Pb系统，测量了向后角度的弹性和准弹性散射的激发函数。从这些测得的激励函数中提取出势垒分布，并将其与相应的融合势垒分布进行比较。除某些细节外，对于紧密结合的反应系统，从聚变和弹性/准弹性散射数据得出的势垒分布几乎相同。对于具有弱束缚弹丸的反应系统，从准弹性散射中提取的势垒分布明显不同于聚变势垒分布。但是，从准弹性散射加破坏的激发函数中提取的势垒分布与从完整融合数据中提取的势垒分布几乎相同。这一结果意味着，势垒分布不仅具有核结构信息，而且还具有反应机理的知识。此外，由于中子传递与正Q值耦合，测得的〜（32）S +〜（96）Zr势垒分布是平坦的，并扩展到较低的能量，这将导致聚变截面显着增强在亚势垒能量。但是，我们的结果表明，与模型预测相比，在上述势垒能量下，弱约束射弹与重目标的完全融合受到抑制。

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