Timing angular momentum transfer for parity-unfavored transitions in multiphoton ionization
| Autor: | Qihuang Gong, Hao Liang, Yongkai Deng, Yiqi Fang, Z.Y. Guo, Peipei Ge, Yunquan Liu, Xiaoyang Yu, Meng Han, Liang-You Peng |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review A. 102 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.102.061101 |
| Popis: | When a bound electron is photoionized from an atom or molecule, the remaining multielectron ion with excess internal energy will relax towards lower-energy states. The subsequent transverse angular momentum transfer between the parent ion and the ejected electron can lead to an electron parity-unfavored transition. Here we perform a self-calibrated timing experiment to measure the time delay of the angular momentum transfer of parity-unfavored transitions during the multiphoton ionization. We use a strong linearly polarized 400-nm light field to trigger a parity-unfavored transition in the channel of the spin-orbit excited ionic state of krypton atoms and then selectively probe the phases of the electron wave functions with different magnetic quantum numbers with a weak parallelly (orthogonally) polarized 800-nm light field. The parallel and orthogonal probes serve as the start and the stop of a stopwatch, respectively. Hence, this allows us to access the characteristic time of such an ultrafast intra-atom multielectron process. |
| Databáze: | OpenAIRE |
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