论文标题
Xuv h $ _2 $分子研究的XUV电离
XUV ionization of the H$_2$ molecule studied with attosecond angular streaking
论文作者
论文摘要
我们研究h $ _2 $分子的attosentime photoionization的方向和两中性干扰效应。 h $ _2 $的XUV电离的时间分辨率是通过kheifets {\ em et al} [arXiv：2202.06147（2022）的阶段检索能力而获得的。一旦应用于h $ _2 $，该技术就会提供各向异性相和时间延迟，这两者都敏感地取决于分子轴方向。此外，光电子动量分布显示出非常清晰的两中心干扰模式。当由于Walter和Briggs引起的干扰公式时[J。物理。应用B {\ bf 32} 2487（1999）]，有效的光电子动量似乎大于检测器的渐近动量。这种效果由光发射中心周围的分子电位孔解释。
We study orientation and two-center interference effects in attosecond time-resolved photoionization of the H$_2$ molecule. Time resolution of XUV ionization of H$_2$ is gained through the phase retrieval capability of attosecond angular streaking demonstrated earlier by Kheifets {\em et al} [arXiv:2202.06147 (2022)]. Once applied to H$_2$, this technique delivers an anisotropic phase and time delay which both depend sensitively on the molecular axis orientation. In addition, the photoelectron momentum distribution displays a very clear two-center interference pattern. When the interference formula due to Walter and Briggs [J. Phys. B {\bf 32} 2487 (1999)] is applied, an effective photoelectron momentum appears to be greater than the asymptotic momentum at the detector. This effect is explained by a molecular potential well surrounding the photoemission center.
