论文标题
入口通道对多核转移反应中外来阳离子的生产横截面的影响
Influence of entrance channel on production cross section of exotic actinides in multinucleon transfer reactions
论文作者
论文摘要
在双核系统模型的框架内，已系统地研究了质量不对称性和同胞素对外来阳离子的影响的影响。分析了CM（248）的CA（48），KR（86），XE（136）和U（238）轰炸的多核转移反应中的同位素屈服，并与可用的实验数据进行了分析。关于弹丸诱导的反应，与$^{232} $ th，$^{238} $ u和$^{248} $ cm的反应有关，从AC到LR生产未知actinides的系统学。计算反应系统的势能表面和总动能分布，可用于预测生产横截面趋势。发现较重的弹丸会导致同一目标的更广泛的同位素链分布。较重的基于目标的反应更喜欢通过深弹性和准膜反应的两种机制产生大量的外来阳离子。同源性松弛在碰撞过程中起着至关重要的作用，导致肌动剂同位素分布倾向于转向滴水线。已经在nanobarn至millibarn的水平上预测了大量新的actinides。为即将进行的实验提出了最佳的弹丸靶标组合和束能。
Within the framework of the dinuclear system model, the influence of mass asymmetry and the isospin effect on the production of exotic actinides have been investigated systematically. The isotopic yields populate in multinucleon transfer reactions of Ca(48), Kr(86), Xe(136), and U(238) bombarding on Cm(248) are analyzed and compared to the available experimental data. Systematics on the production of unknown actinides from Ac to Lr via the available stable elements on the earth (from Ar to U) as projectiles-induced reactions with $^{232}$Th, $^{238}$U and $^{248}$Cm are investigated thoroughly. Potential energy surface and total kinetic energy distribution for the reaction system are calculated and can be used to predict the production cross-section trends. It is found that the heavier projectile leads to the wider isotopic chain distribution for the same target. The heavier target-based reactions prefer to produce plenty of exotic actinides through both mechanisms of deep-inelastic and quasi-fission reactions. Isospin relaxation plays a crucial role in the colliding process, resulting in actinide isotopic distribution tends to shift to the drip lines. Massive new actinides have been predicted at the level of nanobarn to millibarn. The optimal projectile-target combinations and beam energies were proposed for the forthcoming experiments.
