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arXiv · 2204.09161

XUV ionization of the H$_2$ molecule studied with attosecond angular streaking

Vladislav V. Serov·Anatoli S. Kheifets
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Abstract

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.

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Vladislav V. Serov, Anatoli S. Kheifets. 2022-04-19. XUV ionization of the H$_2$ molecule studied with attosecond angular streaking. https://doi.org/10.1088/1361-6455/acaa23

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