Photodissociation spectroscopy of cold ions produced in a free jet expansion

Bejjani, Raghed

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https://hdl.handle.net/2142/107436 Copy

Description

Title

Photodissociation spectroscopy of cold ions produced in a free jet expansion

Author(s)

Bejjani, Raghed

Contributor(s)

• Lauzin, Clément
• Urbain, Xavier
• Roucou, Anthony

Issue Date

2020-06-22

Keyword(s)

Instrument/Technique Demonstration

Abstract

We will present an instrument developed in house able to produce cold molecular ions and ionic van der Waals complexes. The aim of this instrument is to study such species by high-resolution photodissociation spectroscopy. Its main components are (i) a pulsed supersonic expansion plasma source, to produce the desired species at relatively low rotational temperature (50-70K), (ii) a time of flight mass spectrometer which includes a single unit able to perform acceleration, bunching and gating\footnote{C. Dedman, Review of Scientific Instruments 72 (2001) 2915-2922}, and (iii) a photodissociation laser followed by a second mass selection of the fragmented ion. We will be presenting the first results obtained with this apparatus, (i)the first mass spectra of cationic and anionic species, formed from different gas mixtures and (ii) the first photodissociation spectra of the rovibronic overtones of $N_2O^+$ using a dye laser. Finally, future improvements, in terms of clusters production, spectral resolution and sensitivity will be discussed.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

Text

Language

eng

Permalink

http://hdl.handle.net/2142/107436

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Copyright 2020 is held by the Author(s)

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