期刊
PHYSICAL REVIEW A
卷 78, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.78.043407
关键词
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资金
- U. K. EPSRC [EP/D07309X/1]
- Faculty Research Fund of the School of Mathematics and Physical Sciences (UCL)
- Engineering and Physical Sciences Research Council [EP/D07309X/2, EP/D07309X/1] Funding Source: researchfish
- EPSRC [EP/D07309X/2, EP/D07309X/1] Funding Source: UKRI
We address the influence of the orbital symmetry and the molecular alignment with respect to the laser-field polarization on laser-induced nonsequential double ionization of diatomic molecules, in the length and velocity gauges. We work within the strong-field approximation and assume that the second electron is dislodged by electron-impact ionization, and also consider the classical limit of this model. We show that the electron-momentum distributions exhibit interference maxima and minima due to electron emission at spatially separated centers. The interference patterns survive integration over the transverse momenta for a small range of alignment angles, and are sharpest for parallel-aligned molecules. Due to the contributions of the transverse-momentum components, these patterns become less defined as the alignment angle increases, until they disappear for perpendicular alignment. This behavior influences the shapes and the peaks of the electron-momentum distributions.
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