Continuous rainbow RABBITT investigation of resonant states in He and H$_2$
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866929713107173376 |
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| author | Serov, Vladislav Kheifets, Anatoli |
| author_facet | Serov, Vladislav Kheifets, Anatoli |
| contents | We employ Reconstruction of Attosecond Beating By Interference of Two-photon Transitions with an advanced energy resolution (rainbow RABBITT) to resolve under-threshold discrete excitations and above-threshold auto-ionizing states in the He atom and the H$_2$ molecule. Both below and above the threshold, the whole series of resonances is reconstructed continuously and at once by the parity based separation of the two-photon ionization amplitude. This allows for an efficient extraction of the RABBITT magnitude and phase parameters without the need for adjusting the laser photon frequency. The latter parameters are then used to test the validity of the logarithmic Hilbert transform which relates the RABBITT phase and magnitude in the resonant region. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_08811 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Continuous rainbow RABBITT investigation of resonant states in He and H$_2$ Serov, Vladislav Kheifets, Anatoli Atomic Physics We employ Reconstruction of Attosecond Beating By Interference of Two-photon Transitions with an advanced energy resolution (rainbow RABBITT) to resolve under-threshold discrete excitations and above-threshold auto-ionizing states in the He atom and the H$_2$ molecule. Both below and above the threshold, the whole series of resonances is reconstructed continuously and at once by the parity based separation of the two-photon ionization amplitude. This allows for an efficient extraction of the RABBITT magnitude and phase parameters without the need for adjusting the laser photon frequency. The latter parameters are then used to test the validity of the logarithmic Hilbert transform which relates the RABBITT phase and magnitude in the resonant region. |
| title | Continuous rainbow RABBITT investigation of resonant states in He and H$_2$ |
| topic | Atomic Physics |
| url | https://arxiv.org/abs/2502.08811 |