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Photoionization of gases.

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In this thesis Matthew Simpson reports two areas of work in gas ion spectroscopy, each investigation in itself worthy of a PhD. The first study uses tunable vacuum-ultraviolet radiation from a synchrotron to identify negative ions from twenty four photoexcited polyatomic molecules in the gas phase. From these experiments, Matthew collects a vast amount of data and summarises and reviews ion-pair formation from polyatomic molecules.  The second study is on selected ion flow tube mass spectrometry. Matthew investigates the reactions of cations and anions with ethene, monofluoroethene, 1,1-difluoroethene and tetrafluoroethene. In this study Matthew tries to explain why certain products are formed preferentially over other products at a microscopic level of understanding. The data recorded in this thesis form the most comprehensive collection of information about anion formation and are the basis of a review and numerous articles in specialist journals.

Microphysique. --- Organic compounds -- Analysis. --- Spectrum analysis. --- Structure électronique. --- Gases --- Ionization of gases --- Physics --- Chemistry --- Physical Sciences & Mathematics --- Electricity & Magnetism --- Light & Optics --- Analytical Chemistry --- Spectra --- Photoionization of gases. --- Polyatomic molecules. --- Gases, Photoionization of --- Chemistry. --- Spectroscopy. --- Physical chemistry. --- Microscopy. --- Spectroscopy/Spectrometry. --- Spectroscopy and Microscopy. --- Physical Chemistry. --- Molecules --- Chemistry, Physical organic. --- Chemistry, Physical organic --- Chemistry, Organic --- Chemistry, Physical and theoretical --- Analysis, Spectrum --- Spectrochemical analysis --- Spectrochemistry --- Spectroscopy --- Chemistry, Analytic --- Interferometry --- Optics --- Radiation --- Wave-motion, Theory of --- Absorption spectra --- Light --- Spectroscope --- Qualitative --- Spectrometry --- Chemistry, Theoretical --- Physical chemistry --- Theoretical chemistry --- Analysis, Microscopic --- Light microscopy --- Micrographic analysis --- Microscope and microscopy --- Microscopic analysis --- Optical microscopy --- Analytical chemistry