Abstract
This chapter presents a new method of extracting and velocity-mapping both the ions and electrons resulting from photoionisation onto a single detector in each acquisition cycle. It is demonstrated that it is possible to maintain a high velocity resolution using this approach through the simultaneous imaging of the photoelectrons and photoions resulting from the (\(3+2\)) resonantly enhanced multi-photon ionisation of Br atoms produced following the photodissociation of Br\(_{2}\) at 446.41 nm. Pulsed ion extraction represents a substantial simplification in experimental design over conventional photoelectron-photoion coincidence (PEPICO) imaging spectrometers and is an important step towards performing coincidence experiments using a conventional ion imaging apparatus coupled with a fast imaging detector. The performance of the PImMS camera in this application is investigated, and a new method for the determination of the photofragment detection efficiencies based on a statistical fitting of the coincident photoelectron and photoion data is presented.
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Slater, C.S. (2016). Pulsed-Field Electron-Ion Imaging. In: Studies of Photoinduced Molecular Dynamics Using a Fast Imaging Sensor. Springer Theses. Springer, Cham. https://doi.org/10.1007/978-3-319-24517-1_4
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DOI: https://doi.org/10.1007/978-3-319-24517-1_4
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