On the formation of van der Waals complexes through three-body recombination
| Autor: | Jesús Pérez-Ríos, Marjan Mirahmadi |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Chemical Physics (physics.chem-ph) Work (thermodynamics) 010304 chemical physics Trajectory method Buffer gas General Physics and Astronomy FOS: Physical sciences 010402 general chemistry 01 natural sciences Molecular physics 0104 chemical sciences symbols.namesake LeRoy radius Physics - Chemical Physics 0103 physical sciences Atom symbols Molecule Physical and Theoretical Chemistry van der Waals force Recombination |
| Zdroj: | The Journal of Chemical Physics |
| ISSN: | 1089-7690 |
| Popis: | In this work, we show that van der Waals molecules X-RG (where RG is the rare gas atom) may be created through direct three-body recombination collisions, i.e., X + RG + RG $\rightarrow$ X-RG + RG. In particular, the three-body recombination rate at temperatures relevant for buffer gas cell experiments is calculated via a classical trajectory method in hyperspherical coordinates [J. Chem. Phys. 140, 044307 (2014)]. As a result, it is found that the formation of van der Waals molecules in buffer gas cells (1 K $\lesssim T \lesssim 10$ K) is dominated by the long-range tail (distances larger than the LeRoy radius) of the X-RG interaction. For higher temperatures, the short-range region of the potential becomes more significant. Moreover, we notice that the rate of formation of van der Walls molecules is of the same order of magnitude independently of the chemical properties of X. As a consequence, almost any X-RG molecule may be created and observed in a buffer gas cell under proper conditions. Comment: 10 pages, 8 figures, submitted to the Journal of Chemical Physics |
| Databáze: | OpenAIRE |
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