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An instrument combining an electrospray ionization source and a velocity-map imaging spectrometer for studying delayed electron emission of polyanions

Abstract : An instrument combining an electrospray ionization source and a velocity-map imaging (VMI) spectrometer has been developed in order to study the delayed electron emission of molecular anions and especially of polyanions. It operates at a high repetition rate (kHz) in order to increase the acquisition speed. The VMI spectrometer has been upgraded for nanosecond time resolution by gating the voltages applied on the position-sensitive detector. Kinetic energy release distribution of thermionic emission (without any contribution from direct detachment) can be recorded for well-defined delays after the nanosecond laser excitation. The capability of the instrument is demonstrated by recording photodetachment spectra of the benchmark C60− anion and C842− dianion.
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Submitted on : Wednesday, October 2, 2019 - 4:50:43 PM
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Bruno Concina, Evangelos Papalazarou, Marc Barbaire, Christian Clavier, Jacques Maurelli, et al.. An instrument combining an electrospray ionization source and a velocity-map imaging spectrometer for studying delayed electron emission of polyanions. Review of Scientific Instruments, American Institute of Physics, 2016, 87, pp.033103. ⟨10.1063/1.4942914⟩. ⟨hal-02303906⟩

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