| Autor: |
Aardema MN; Department of Chemistry, Texas A&M University, College Station, Texas77842, United States., McBane GC; Department of Chemistry, Grand Valley State University, Allendale, Michigan49401, United States., North SW; Department of Chemistry, Texas A&M University, College Station, Texas77842, United States. |
| Jazyk: |
angličtina |
| Zdroj: |
The journal of physical chemistry. A [J Phys Chem A] 2022 Oct 06; Vol. 126 (39), pp. 6898-6907. Date of Electronic Publication: 2022 Sep 21. |
| DOI: |
10.1021/acs.jpca.2c04832 |
| Abstrakt: |
We report the rotational state distribution and vector correlations of the O 2 (a 1 Δ g , v = 0) fragments arising from the 226 nm photodissociation of jet-cooled O 3 . Consistent with previously reported trends, the rotational distribution is shifted to higher rotational states with decreasing wavelength. We observe highly suppressed odd rotational state populations due to a strong Λ-doublet propensity. The measured rotational distribution is in agreement with classical trajectory calculations for the v = 0 products, although the distribution is slightly narrower than predicted. The spatial anisotropy follows the previously observed trend of decreasing β with increasing photon energy with β = 0.72 ± 0.14 for v = 0, j = 38. As expected for a triatomic molecule, the v - j correlation is consistent with v perpendicular to j , but the measured correlation is nonlimiting due, in part, to rotational and translational depolarization. The j -dependent line width of the O 2 (a 1 Δ g ) REMPI spectrum is also discussed in connection with the lifetime of the resonant O 2 (d 1 Π g ) state due to predissociation via the II 1 Π g valence state. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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