Temperature-dependent photodissociation dynamics of ICN at 262 nm

Transient frequency-modulation (FM) Doppler spectroscopy has been used to measure scalar and vector correlations in state-selected CN fragments arising from the photodissociation of ICN at 262 nm at both 296 and 550 K. We find that the state-selected I */I branching ratio changes significantly with...

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Bibliographic Details
Published inChemical physics letters Vol. 334; no. 1; pp. 47 - 54
Main Authors Li, Runjun, McGivern, W.Sean, North, Simon W.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 02.02.2001
Elsevier Science
Subjects
Atomic and molecular physics
Diffuse spectra; predissociation, photodissociation
Exact sciences and technology
Molecular properties and interactions with photons
Photon interactions with molecules
Physics
Temperature dependence
Branching ratio
Ultraviolet radiation
Inorganic compounds
Iodine Cyanides
Photodissociation
Experimental study
Triatomic molecule
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Summary:Transient frequency-modulation (FM) Doppler spectroscopy has been used to measure scalar and vector correlations in state-selected CN fragments arising from the photodissociation of ICN at 262 nm at both 296 and 550 K. We find that the state-selected I */I branching ratio changes significantly with increased temperature, consistent with the increased width of the state-dependent CN rotational distribution. However, we find little change in the state-selected vector properties suggesting that thermal modification of the initial parent vibrational distribution is not a sensitive means to probe the nonadiabatic dynamics.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(00)01441-X