Photoelectron velocity map imaging of vibrationally excited, gas-phase biomolecules and their anions
Bakker, Daniël
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655829.pptx
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https://hdl.handle.net/2142/91245
Description
Title
Photoelectron velocity map imaging of vibrationally excited, gas-phase biomolecules and their anions
Author(s)
Bakker, Daniël
Contributor(s)
Rijs, Anouk
Peters, Atze
van der Made, Rutger
Bakels, Sjors
Issue Date
2016-06-21
Keyword(s)
Instrument/Technique Demonstration
Date of Ingest
2017-01-26T21:38:20Z
Abstract
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A powerful method in spectroscopy to characterize the structure of large, gas phase molecules is to probe the ionization yield upon irradiating the molecules with infrared (IR) and/or ultraviolet (UV) radiation. When this spectroscopic technique is employed, the photodetached electrons are usually ignored, although they contain information on, for example, the ionization threshold of the molecule and the excited states of the formed ions.
Here, the novel combination of a molecular beam mass spectrometer equipped with a laser desorption source, the free electron laser FELIX and the powerful velocity map imaging (VMI) technique is presented. With this extended set of tools we can bring large molecules intact into the gas phase and prepare them in specific vibrationally excited states. UV or VUV radiation can subsequently be used to ionize the molecules. The kinetic energy and the radial distribution of the photoelectrons can be measured using VMI combined with ion detection using a time-of-flight mass spectrometer.
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1787.pdf
655829.pptx
