Production of proton-rich actinide nuclei in the multinucleon transfer reaction 58Ni+232Th
Production of proton-rich actinide nuclei in the multinucleon transfer reaction 58Ni+232Th
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DOI：
10.1007/s11433-019-1484-0
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发表时间：
2020-02
期刊：
影响因子：
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通讯作者：
Zhenji Wu;Lu Guo
中科院分区：
文献类型：
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作者：
Zhenji Wu;Lu Guo
近年来，多核子转移反应因其合成新的奇异核的潜力而引起人们的极大关注。这些核很难在聚变-蒸发反应和碎裂过程中产生，这是由于极小的产生截面和/或缺乏适当的射弹-靶组合。在20世纪70年代早期，多核子转移反应被用于生产轻富中子同位素[1]。从那时起，许多实验室进行了许多实验研究，通过多核子转移反应产生重核[2]，但由于实验技术的限制，未能观察到新的同位素。随着十年前这一主题的复兴，广泛的实验工作[3-5]已经被报道，并进一步理解了多核子转移过程中的反应机制。例如，沿着N= 126壳层的沿着富中子同位素，对于天体物理r过程[6，7]是非常有趣的，已经通过多核子转移反应实验产生[3]。在核景观的富质子一侧，在多核子转移反应中观察到了几种Z≥ 92的新同位素[4]。生产这些所需的同位素不仅需要高效的分离和检测设施，还需要对反应机理的理解和可靠的理论预测。
In recent years, multinucleon transfer reactions have attracted significant attention for their potential to synthesize new exotic nuclei. These nuclei are difficult to be produced in fusion-evaporation reactions and fragmentation processes due to the extremely small production cross sections and/or the lack of appropriate projectile-target combinations. In the early 1970s, multinucleon transfer reactions have been used for the production of the light neutron-rich isotopes [1]. Since then, numerous laboratories have performed many experimental studies to produce heavy nuclei via multinucleon transfer reactions [2], but failed to observe new isotopes due to the limitation of experimental techniques. With the revival of this topic decade ago, extensive experimental efforts [3-5] have been reported and furthered the understanding of reaction mechanisms in multinucleon transfer processes. For example, the neutron-rich isotopes along the N= 126 shell, which are extremely interesting for the astrophysical r-process [6, 7], have been produced experimentally via multinucleon transfer reactions [3]. In the protonrich side of the nuclear landscape, several new isotopes with Z≥ 92 have been observed in the multinucleon transfer reaction [4]. Producing these desired isotopes requires not only efficient separation and detection facilities, but also the understanding of the reaction mechanism and reliable theoretical predictions.