Scalar and angular correlations in CF3NO photodissociation: statistical and nonstatistical channels
| Autor: | Joseph I. Cline, Julia S. Spasov |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | The Journal of Chemical Physics. 110:9568-9577 |
| ISSN: | 1089-7690 0021-9606 |
| DOI: | 10.1063/1.478922 |
| Popis: | Polarized 1+1′ REMPI combined with TOFMS detection was used to obtain recoil speed distributions, NO product rotational distributions, and μ–v–jNO angular correlations in the photofragmentation of CF3NO between 585 and 650 nm. At wavelengths longer than 610 nm dissociation occurs only on the S0 potential energy surface of CF3NO. At 585 nm the product recoil speed distribution is bimodal, with the higher speed component attributed to dissociation across a potential barrier on the T1 surface. Measurements of the T1 channel NO product trajectory show it has no laboratory frame rotational alignment or recoil anisotropy, but has a significant preference for v⊥jNO angular correlation, reaching a maximal value of β00(22)=−0.308±0.052. The results are interpreted using the results of statistical phase space theory and classical trajectory calculations. It is concluded that S0 channel dissociation occurs by a statistical dissociation mechanism whereas the T1 channel dynamics is dominated by exit channel recoil for... |
| Databáze: | OpenAIRE |
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