论文标题
对融合屏障特征的系统研究相对论均值场形式主义
Systematic study of fusion barrier characteristics within the relativistic mean-field formalism
论文作者
论文摘要
背景：核相互作用的潜力，因此相互作用核之间形成的融合屏障是理解复杂融合过程动力学的关键。 目的：这项工作旨在探索相对论均值（RMF）形式主义中不同目标项目组合的融合屏障特征。 方法：相互作用的核和微观R3Y NN相互作用的密度分布是从非线性NL1，NL3，TM1和相对论hartree-Hartree-Hartree-Hartree-Bogoliubov（RHB）方法的相对论平均场（RMF）形式上获得的。使用众所周知的$ \ ell $ summed Wong模型计算出不同反应系统的融合和/或捕获横截面。 结果：对于不同的核密度分布和有效的NN相互作用势，获得了24个重离子反应系统的屏障高度和位置。从$ \ ell $ summed Wong模型获得的融合和/或捕获横截面的比较是通过可用的实验数据进行的。 结论：观察到现象学M3Y NN潜力比所有反应系统的相对论R3Y NN潜力都具有更高的屏障高度。从不同相对论参数集获得的结果比较表明，NL1和TM1参数集的密度可为所有正在研究的系统提供最低和最高的屏障高度。我们观察到DDR3Y NN电位的较高的屏障高度和较低的横截面与密度无关的R3Y NN电位相比，该电位已被考虑在内的非线性NL1，NL3和TM1参数集。根据目前的分析，得出的结论是，NL1和NL3参数集与实验融合和/或捕获横截面相比，与TM1和DDME2参数集相对更好。
Background: The nuclear interaction potential and hence the fusion barrier formed between the interacting nuclei are the keys to understanding the complex fusion process dynamics. Purpose: This work intends to explore the fusion barrier characteristics of different target-projectile combinations within the relativistic mean-field (RMF) formalism. Methods: The density distributions of interacting nuclei and the microscopic R3Y NN interaction are obtained from relativistic mean-field (RMF) formalism for non-linear NL1, NL3, TM1, and relativistic-Hartree-Bogoliubov (RHB) approach for DDME2 parameter sets. The fusion and/or capture cross-section for the different reaction systems is calculated using the well-known $\ell$-summed Wong model. Results: The barrier height and position of 24 heavy-ion reaction systems are obtained for different nuclear density distributions and effective NN interaction potentials. The comparison of fusion and/or capture cross-section obtained from the $\ell$-summed Wong model is made with the available experimental data. Conclusions: The phenomenological M3Y NN potential is observed to give higher barrier heights than the relativistic R3Y NN potential for all the reaction systems. The comparison of results obtained from different relativistic parameter sets shows that the densities from NL1 and TM1 parameter sets give the lowest and highest barrier heights for all the systems under study. We observed higher barrier heights and lower cross-sections for DDR3Y NN potential as compared to density-independent R3Y NN potentials obtained for considered non-linear NL1, NL3 and TM1 parameter sets. According to the present analysis, it is concluded that the NL1 and NL3 parameter sets provide comparatively better overlap with the experimental fusion and/or capture cross-section than the TM1 and DDME2 parameter sets.
