Photodissociation spectroscopy and dynamics of free radicals, clusters, and ions

Thesis/Dissertation · Tue Nov 30 23:00:00 EST 1999

DOI:https://doi.org/10.2172/753102· OSTI ID:753102

Choi, Hyeon ^[1]

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1. Univ. of California, Berkeley, CA (United States); LBNL Library

The photodissociation spectroscopy and dynamics of free radicals and ions is studied to characterize the dissociative electronic states in these species. To accomplish this, a special method of radical production, based on the photodetachment of the corresponding negative ion, has been combined with the technique of fast beam photofragment translational spectroscopy. The photofragment yield as a function of photon energy is obtained, mapping out the dissociative and predissociative electronic states. Branching ratios to various product channels, the translational energy distributions of the fragments, and bond dissociation energies are then determined at selected photon energies. The detailed picture of photodissociation dynamics is provided with the aid of ab initio calculations and a statistical model to interpret the observed data. Important reaction intermediates in combustion reactions have been studied: CCO, C₂H₅O, and linear C_n (n = 4--6).

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 753102
• Report Number(s): LBNL--44715
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
COMBUSTION KINETICS
DISSOCIATION
ELECTRONIC STRUCTURE
EXCITED STATES
ION PAIRS
IONS
PHOTOCHEMISTRY
RADICALS
REACTION INTERMEDIATES
SAMPLE PREPARATION