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Ivan Powis
Researcher at University of Nottingham
Publications - 138
Citations - 4888
Ivan Powis is an academic researcher from University of Nottingham. The author has contributed to research in topics: Photoionization & Ionization. The author has an hindex of 37, co-authored 133 publications receiving 4238 citations. Previous affiliations of Ivan Powis include University of Oxford & University of Chicago.
Papers
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Two-dimensional charged particle image inversion using a polar basis function expansion
TL;DR: The pBasex algorithm as mentioned in this paper reconstructs the original Newton sphere of expanding charged particles from its two-dimensional projection by fitting a set of basis functions with a known inverse Abel integral, adapted to the polar symmetry of the photoionization process to optimize the energy and angular resolution.
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Detecting chirality in molecules by imaging photoelectron circular dichroism
Maurice H. M. Janssen,Ivan Powis +1 more
TL;DR: The capabilities and the potential of PECD are illustrated with various experimental examples and computational methods that are able to model quantitatively experimental PECD results are introduced, focusing on velocity map coincidence imaging where the momentum distribution of both the electron and the coincident ion is measured.
Journal ArticleDOI
Imaging photoelectron circular dichroism of chiral molecules by femtosecond multiphoton coincidence detection
TL;DR: The electron-ion coincidence technique using multiphoton ionization opens new directions in table-top analytical mass-spectrometric applications of mixtures of chiral molecules.
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Photoelectron circular dichroism of the randomly oriented chiral molecules glyceraldehyde and lactic acid
TL;DR: In this article, the angular distribution of the photoelectrons created by photoionization of a given enantiomer, even when the target molecules are randomly oriented, was investigated for C3H6O3 structural isomers lactic acid and glyceraldehyde.
Book
High resolution laser photoionization and photoelectron studies
TL;DR: In this paper, Baer et al. presented an overview of threshold photoionization and its application in high-resolution spectroscopy with photoelectrons, including the use of VUV-ZEKE Spectroscopy of molecular systems.