Measurement of electron affinity of iridium atom and photoelectron angular distributions of iridium anion
| العنوان: | Measurement of electron affinity of iridium atom and photoelectron angular distributions of iridium anion |
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| المؤلفون: | Chuangang Ning, Jing Zhao, Yuzhu Lu, Xiaoxi Fu, Rulin Tang |
| المصدر: | The Journal of Chemical Physics. 152:034302 |
| بيانات النشر: | AIP Publishing, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Physics, 010304 chemical physics, Strong interaction, General Physics and Astronomy, chemistry.chemical_element, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Ion, chemistry, X-ray photoelectron spectroscopy, Electron affinity, 0103 physical sciences, Atom, Ion trap, Iridium, Physical and Theoretical Chemistry, Atomic physics, Anisotropy |
| الوصف: | The latest electron affinity value of an iridium atom is 1.564 36(15) eV, determined via a method based on the Wigner threshold law by Bilodeau and co-workers. However, they observed a significant deviation from the Wigner threshold law in the threshold photodetachment experiment. To address this dilemma, we conducted high-resolution photoelectron spectroscopy of Ir− via the slow-electron velocity-map imaging method in combination with an ion trap. The electron affinity of Ir was measured to be 12 614.97(9) cm−1 or 1.564 057(11) eV. We find that the Wigner threshold law is still valid for the threshold photodetachment of Ir− through a p-wave fitting of the photodetachment channel Ir−5d86s23F4→Ir5d86sb4F9/2. The photoelectron angular distributions of photodetachment channels Ir−5d86s23F4→Ir5d76s2a4F9/2 and Ir−5d86s23F4→Ir5d86sb4F9/2 were also investigated. The behavior of anisotropy parameter β indicates a strong interaction between the two channels. Moreover, the energy level 3P2 of Ir−, which was not observed in the previous works, was experimentally determined to be 4163.24(16) cm−1 above the ground state.The latest electron affinity value of an iridium atom is 1.564 36(15) eV, determined via a method based on the Wigner threshold law by Bilodeau and co-workers. However, they observed a significant deviation from the Wigner threshold law in the threshold photodetachment experiment. To address this dilemma, we conducted high-resolution photoelectron spectroscopy of Ir− via the slow-electron velocity-map imaging method in combination with an ion trap. The electron affinity of Ir was measured to be 12 614.97(9) cm−1 or 1.564 057(11) eV. We find that the Wigner threshold law is still valid for the threshold photodetachment of Ir− through a p-wave fitting of the photodetachment channel Ir−5d86s23F4→Ir5d86sb4F9/2. The photoelectron angular distributions of photodetachment channels Ir−5d86s23F4→Ir5d76s2a4F9/2 and Ir−5d86s23F4→Ir5d86sb4F9/2 were also investigated. The behavior of anisotropy parameter β indicates a strong interaction between the two channels. Moreover, the energy level 3P2 of Ir−, which was not obs... |
| تدمد: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.5134535 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1c39e93ffa0cbb91062c9c4bc05404d7 https://doi.org/10.1063/1.5134535 |
| رقم الانضمام: | edsair.doi.dedup.....1c39e93ffa0cbb91062c9c4bc05404d7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10897690 00219606 |
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| DOI: | 10.1063/1.5134535 |