STARGATE: A new instrument for high-resolution photodissociation spectroscopy of cold ionic species
(2021) Review of Scientific Instruments — Vol. 92, n° 3, p. 33307 (2021)
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- Authors
Bejjani, Raghed 
Roucou, Anthony Moshkunov, Konstantin
- Abstract
- STARGATE (Spectroscopy of Transient Anions and Radicals by Gated and Accelerated Time-of-flight Experiment) is a new spectrometer developed in UCLouvain. This instrument measures high-resolution photodissociation spectra of mass-selected ions by the combination of a Time-Of-Flight (TOF) spectrometer including a specific gating, bunching and re-referencing unit with a nanosecond pulsed dye laser, a pulsed deflection and an energy selector. The ionic species are generated in a supersonic jet expansion by means of an electric discharge or by the impact of electrons coming from an electron gun. The versatility of the molecular systems which can be addressed by this instrument is illustrated by the presentation of mass spectra of cations, anions and ionic clusters formed from different gas mixtures and backing pressures. The high-resolution spectrum of the eA2S+(002) eX2P3=2(000) and eA2S+(002) eX2P1=2(000) rovibronic bands of N2O+ has been measured and analysed to provide refined molecular parameters in the eA2S+(002) upper state. The eA2S+(002) eX2P3=2(000) band has been used to evaluate the quality of the experimental set-up in terms of rotational temperature, time of measurement for certain signal to noise ratio and the accuracy of the determination of the wavenumber scale.
- Affiliations
Citations
Bejjani, R., Roucou, A., Urbain, X., Moshkunov, K., Vanlancker, G., & Lauzin, C. (2021). STARGATE: A new instrument for high-resolution photodissociation spectroscopy of cold ionic species. Review of Scientific Instruments, 92(3), 33307. https://doi.org/10.1063/5.0039627 (Original work published 2021)