Microscopic study of compound-nucleus formation in cold-fusion reactions
Microscopic study of compound-nucleus formation in cold-fusion reactions
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DOI：
10.1103/physrevc.105.054610
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发表时间：
2022-05
影响因子：
3.1
通讯作者：
Xiang-Xiang Sun-Xiang;Lu Guo
中科院分区：
文献类型：
--
作者：
Xiang-Xiang Sun-Xiang;Lu Guo
对聚变概率的认识对于揭示超重元素的产生机制具有特别重要的意义。我们结合时变密度泛函理论、耦合通道方法和动态扩散模型，对复合核的形成进行了微观研究。研究了$^{48}$Ca+$^{208}$Pb、$^{50}$Ti+$^{208}$Pb和$^{54}$Cr+$^{208}$Pb三种冷聚变反应的聚变概率和复合核形成截面，发现这些反应的捕获势垒和捕获截面与实验数据一致。在捕获势垒以上，我们的计算相当好地再现了测量到的聚变概率。我们的研究表明，微观动力学理论的限制提高了耦合通道和扩散计算的预测能力。
The understanding of the fusion probability is of particular importance to reveal the mechanism of producing superheavy elements. We present a microscopic study of the compound nucleus formation by combining time-dependent density functional theory, coupled-channels approach, and dynamical diffusion models. The fusion probability and compound nucleus formation cross sections for cold-fusion reactions $^{48}$Ca+$^{208}$Pb, $^{50}$Ti+$^{208}$Pb, and $^{54}$Cr+$^{208}$Pb are investigated and it is found that the deduced capture barriers, capture cross sections for these reactions are consistent with experimental data. Above the capture barrier, our calculations reproduce the measured fusion probability reasonably well. Our studies demonstrate that the restrictions from the microscopic dynamic theory improve the predictive power of the coupled-channels and diffusion calculations.