| Autor: |
Bitto, H., Willmott, P. R., Huber, J. Robert |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 10/1/1991, Vol. 95 Issue 7, p4765, 7p |
| Abstrakt: |
The rotational state dependence of the radiationless processes of S1 propynal, HC≡CCHO, was investigated in three selected vibronic bands located at an excess energy of about 3000 cm-1 in a molecular beam using molecular quantum beat spectroscopy. The number of quantum beat frequencies counted in single rovibronic fluorescence decays shows a clear dependence on the rotational quantum number N of the excited rovibronic singlet state, reflecting an increase of the number of coupling triplet states nT by a factor of 4, from N=0 to 14. This increase is accompanied by a lengthening of the decay lifetimes by a factor of 3. Given eigenstate resolution, the effect of magnetic interactions in the triplet state is discussed and it is concluded that the N dependence is predominantly due to mixing of K states resulting in a symmetry breakdown. This mixing is proposed to be mainly induced by hyperfine interaction via the dipole–dipole term. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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