| Autor: |
Tang, Guoqiang, Besemer, Matthieu, de Jongh, Tim, Shuai, Quan, van der Avoird, Ad, Groenenboom, Gerrit C., van de Meerakker, Sebastiaan Y. T. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 8/14/2020, Vol. 153 Issue 6, p1-13, 13p, 2 Color Photographs, 1 Chart, 11 Graphs |
| Abstrakt: |
We present a combined experimental and theoretical study of state-to-state inelastic collisions between NO (X2Π1/2, j = 1/2, f) radicals and D2 (j = 0, 1, 2, 3) molecules at collision energies of 100 cm−1 and 750 cm−1. Using the combination of Stark deceleration and velocity map imaging, we fully resolve pair-correlated excitations in the scattered molecules. Both spin–orbit conserving and spin–orbit changing transitions in the NO radical are measured, while the coincident rotational excitation (j = 0 → j = 2) and rotational de-excitation (j = 2 → j = 0 and j = 3 → j = 1) in D2 are observed. De-excitation of D2 shows a strong dependence on the spin–orbit excitation of NO. We observe translation-to-rotation energy transfer as well as direct rotation-to-rotation energy transfer at the lowest collision energy probed. The experimental results are in good agreement with cross sections obtained from quantum coupled-channels calculations based on recent NO–D2 potential energy surfaces. The observed trends in the correlated scattering cross sections are understood in terms of the NO–D2 quadrupole–quadrupole interaction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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