论文标题
回忆引起的$^{229} $ th的核激发
Recollision induced nuclear excitation of $^{229}$Th
论文作者
论文摘要
以前，我们提出了一种使用激光驱动的电子回忆[W. Wang等人，物理。莱特牧师。 127，052501（2021）]。当前的文章旨在通过解释进一步的理论细节并提出扩展的新结果来阐述该方法。通过采用Tkalya最近计算出的电子激发横截面，该方法也得到了改善[E. V. Tkalya，物理。莱特牧师。 124，242501（2020）]。新的横截面是从狄拉克扭曲的波浪计算中获得的，而不是从狄拉克平面波计算中获得的，如我们先前使用的那样。扭曲的波浪横截面显示出比平面波结果高5到6个数量级。随着激发横截面的更新，从电子回忆中计算出$^{229} $ th的异构激发的概率的计算为$ 10^{ - 12} $ aver（forstosecond）激光脉冲的订单。计算和讨论激发概率对各种激光参数的依赖性，包括激光强度，激光波长和激光脉冲持续时间。
Previously we proposed a new approach of exciting the $^{229}$Th nucleus using laser-driven electron recollision [W. Wang et al., Phys. Rev. Lett. 127, 052501 (2021)]. The current article is aimed to elaborate the method by explaining further theoretical details and presenting extended new results. The method has also been improved by adopting the electronic excitation cross sections calculated recently by Tkalya [E. V. Tkalya, Phys. Rev. Lett. 124, 242501 (2020)]. The new cross sections are obtained from Dirac distorted-wave calculations instead of from Dirac plane-wave calculations as we used previously. The distorted-wave cross sections are shown to be 5 to 6 orders of magnitude higher than the plane-wave results. With the excitation cross sections updated, the probability of isomeric excitation of $^{229}$Th from electron recollision is calculated to be on the order of $10^{-12}$ per nucleus per (femtosecond) laser pulse. Dependency of the excitation probability on various laser parameters is calculated and discussed, including the laser intensity, the laser wavelength, and the laser pulse duration.
