| Autor: |
Xi-Lin Bai, Xue-Dong Zhang, Fu-Qiang Zhang, Timothy C Steimle |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Chinese Physics B. 31:053301 |
| ISSN: |
1674-1056 |
| Popis: |
As a model molecule of actinide chemistry, UO molecule plays an important role in understanding the electronic structure and chemical bonding of actinide-containing species. We report a study of the laser-induced fluorescence spectra of the U16O and U18O using two-dimensional spectroscopy. Several rotationally resolved excitation spectra were investigated. Accurate molecular rotational constants and equilibrium internuclear distances were reported. Low-lying electronic states information was extracted from high resolution dispersed fluorescence spectra and analyzed by the ligand field theory model. The configuration of the ground state was determined as U2+(5f37s)O2−. The branching ratios, and the vibrational harmonic and anharmonic parameters were also obtained. Radiative lifetimes were determined by recording the time-resolved fluorescence spectroscopy. Transition dipole moments were calculated using the branching ratios and the radiative lifetimes. These findings were elucidated by using quantum-chemical calculations, and the chemical bonding was also analyzed. The findings presented in this work will enrich our understanding of actinide-containing molecules. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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