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Photodissociation dynamics of dichlorocarbene at 248 nm

Content Provider	Royal Society of Chemistry (RSC)
Author	Dagdigian, Paul J. Shin, Seung Keun
Copyright Year	2006
Abstract	The dynamics of the 248 nm photodissociation of the CCl2 molecule have been investigated in a molecular beam experiment. The CCl2 parent molecule was generated in a molecular beam by pyrolysis of CHCl3, and both CCl2 and the CCl photofragment were detected by laser fluorescence excitation. The 248 nm attenuation cross sections was estimated from the reduction of the CCl2 signal as a function of the photolysis laser fluence. The internal state distribution of the CCl photofragment was derived from analysis of laser fluorescence excitation spectra in the A 2Δ − X 2Π band system. The CCl(X 2Π, v = 0) rotational state distribution was found to be bimodal, with maximum populations at N ≈ 10 and 85, and was dependent upon the source backing pressure, and hence upon the internal state distribution of the CCl2 precursor. The 248 nm photodissociation dynamics appears to involve two separate channels, namely nearly impulsive rotational energy release and predissociation with little rotational energy imparted to the CCl fragment.
Starting Page	3446
Ending Page	3452
Page Count	7
File Format	HTM / HTML PDF
ISSN	14639076
Volume Number	8
Issue Number	29
Journal	Physical Chemistry Chemical Physics
DOI	10.1039/b607094a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Pyrolysis Rotational energy Laser Fluorescence CCL2 Photodissociation
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Physical and Theoretical Chemistry

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