Rescattering photoelectron spectroscopy of the CO2 molecule: Progress towards experimental discrimination between theoretical target-structure models

Misaki Okunishi, Yuta Ito, Vandana Sharma, Shejuty Aktar, Kiyoshi Ueda, Robert R. Lucchese, Andrey I. Dnestryan, Oleg I. Tolstikhin, Shunsuke Inoue, Hirokazu Matsui, Toru Morishita

研究成果: Article査読

3 被引用数 (Scopus)

抄録

Photoelectron momentum distributions (PEMDs) generated in strong-field ionization of randomly oriented CO2 molecules by intense infrared laser pulses at 1300-, 1450-, and 1650-nm wavelengths are measured experimentally and analyzed theoretically. The experimental PEMDs extracted along the outermost backward rescattering caustic are well reproduced by theoretical calculations based on the recently derived factorization formula with an analytical returning photoelectron wave packet (RWP). The sensitivity of the theoretical results to the target structure models used in the calculations is investigated. It is shown that RWPs obtained in the single-active-electron (SAE) approximation and by the Hartree-Fock method have only minor differences. On the other hand, differential cross sections (DCSs) for elastic scattering of a photoelectron on the parent molecular ion calculated by ab initio, SAE, and independent-atom model methods are considerably different. This difference almost disappears after averaging over molecular orientations, so the present experiment does not enable us to discriminate between the different target structure models. However, we show that such a discrimination should become possible by measuring PEMD with aligned molecules. This will provide an access to the rich target structure information contained in the DCS.

本文言語English
論文番号053404
ジャーナルPhysical Review A
100
5
DOI
出版ステータスPublished - 2019 11 8

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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