Photodissociation of bromine containing molecules by using cavity ring-down absorption spectroscopy
Date Issued
2006
Date
2006
Author(s)
Wei, Pei-Ying
DOI
en-US
Abstract
Cavity Ring-down Spectroscopy (CRDS) is a relatively new direct absorption technique and its applications are developed very quickly in recently years. The method is based on measurement of the decay rate of a pulse light trapped in an optical cavity which is formed by a pair of highly reflective(R>99.9%) mirrors. A plot of decay rate as a function of laser frequency gives the absorption spectrum.
We used a pump-probe technique to study of nascent vibrational distribution and the quantum yield of Br2 following photodissociation of CH2Br2 and CHBr2Cl and then we can deduce two possible photodissociation mechanisms for CH2Br2 and CHBr2Cl to product Br2. Moreover, the results agree with a given theoretical calculation.
Subjects
腔體振盪吸收光譜法
Cavity Ring-down Spectroscopy
Type
thesis
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