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- W1964204596 endingPage "22" @default.
- W1964204596 startingPage "11" @default.
- W1964204596 abstract "The design, construction and performance of a velocity map imaging spectrometer for the study of molecular photoionisation dynamics is described. The spectrometer has been optimised for the efficient collection and detection of particles (electrons or positively charged ions) generated through the interaction of gas phase molecules with synchrotron radiation. A double Einzel lens, incorporated into the flight tube, enhances the collection efficiency of energetic particles. Computer modelling has been used to trace the trajectories of charged particles through the spectrometer and to assess the image quality. A time and position sensitive delay-line detector is used to record the images. Results from two experimental studies are presented to illustrate the capabilities of the spectrometer. In the first, the effect of electronic autoionisation on the vibrationally resolved photoelectron branching ratios of the N2+ X 2Σg+ state has been investigated in an excitation range where prominent structure due to Rydberg states occurs in the ion yield curve. The results show that autoionisation leads to rotational branch populations that differ from those observed in direct, non-resonant, photoionisation. In the second, the kinetic energy distribution and the angular distribution of O+ fragments formed in the dissociative photoionisation of molecular oxygen have been measured. The timing properties of the detector have allowed O+ fragments to be separated from O2+ parent ions using time-of-flight techniques." @default.
- W1964204596 created "2016-06-24" @default.
- W1964204596 creator A5053934815 @default.
- W1964204596 creator A5058434713 @default.
- W1964204596 date "2012-12-01" @default.
- W1964204596 modified "2023-10-17" @default.
- W1964204596 title "The design and performance of a velocity map imaging spectrometer for the study of molecular photoionisation dynamics" @default.
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- W1964204596 doi "https://doi.org/10.1016/j.chemphys.2012.09.020" @default.
- W1964204596 hasPublicationYear "2012" @default.