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arXiv 1106.0886physics.atm-clus
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用自由电子激光研究原子间库仑衰变

Exploring Interatomic Coulombic Decay by Free Electron Lasers

Philipp V. Demekhin, Spas D. Stoychev, Alexander I. Kuleff, Lorenz S. Cederbaum

摘要:

为了利用激光辐射的高强度,我们建议选择单光子吸收能量过低的频率,并且需要两个或更多个光子来产生可以与其邻居进行原子间库仑衰变(ICD)的原子的状态。对于Ne二聚体,它明确表明,所提出的计划,调查原子间的过程,多光子吸收是更有效的比单光子吸收足够大的频率,直到现在使用。对Ne二聚体的计算包括所有的核动力学和参与态的电离损失,显示了低能ICD电子和Ne $^+$对在不同的激光强度和脉冲宽度下是如何产生的。在更高的强度下,通过两个原子的连续电离产生Ne $^+$对变得具有竞争性,并且各自发射的电子与ICD电子相干干涉。它也表明,测量后的时间延迟可以用来确定ICD的贡献,即使在高激光强度。

英文摘要:

To exploit the high intensity of laser radiation, we propose to select frequencies at which single-photon absorption is of too low energy and two or more photons are needed to produce states of an atom that can undergo interatomic Coulombic decay (ICD) with its neighbors. For Ne dimer it is explicitly demonstrated that the proposed scheme to investigate interatomic processes by multiphoton absorption is much more efficient than with single-photon absorption of sufficiently large frequency as used until now. Extensive calculations on Ne dimer including all the involved nuclear dynamics and the losses by ionization of the participating states show how the low-energy ICD electrons and Ne$^+$ pairs are produced for different laser intensities and pulse durations. At higher intensities the production of Ne$^+$ pairs by successive ionization of the two atoms becomes competitive and the respective emitted electrons interfere coherently with the ICD electrons. It is also demonstrated that a measurement after a time delay can be used to determine the contribution of ICD even at high laser intensity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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