Doping He droplets by laser ablation with a pulsed supersonic jet source

The Review of Scientific Instruments
R KatzyF Stienkemeier

Abstract

Laser ablation offers the possibility to study a rich number of atoms, molecules, and clusters in the gas phase. By attaching laser ablated materials to helium nanodroplets, one can gain highly resolved spectra of isolated species in a cold, weakly perturbed system. Here, we present a new setup for doping pulsed helium nanodroplet beams by means of laser ablation. In comparison to more well-established techniques using a continuous nozzle, pulsed nozzles show significant differences in the doping efficiency depending on certain experimental parameters (e.g., position of the ablation plume with respect to the droplet formation, nozzle design, and expansion conditions). In particular, we demonstrate that when the ablation region overlaps with the droplet formation region, one also creates a supersonic beam of helium atoms seeded with the sample material. The processes are characterized using a surface ionization detector. The overall doping signal is compared to that of conventional oven cell doping showing very similar dependence on helium stagnation conditions, indicating a comparable doping process. Finally, the ablated material was spectroscopically studied via laser induced fluorescence.

References

Aug 25, 2004·Physical Review Letters·André FielickeGerard Meijer
Nov 6, 2007·The Review of Scientific Instruments·M MudrichF Stienkemeier
Nov 14, 2007·The Journal of Physical Chemistry. a·Oliver BünermannFrank Stienkemeier
Jul 17, 2008·Angewandte Chemie·J Peter Toennies, Andrey F Vilesov
May 2, 2009·The Review of Scientific Instruments·Dominik PentlehnerKfir Luria
Jan 15, 2011·Physical Review Letters·Frauke BierauGert von Helden
Apr 1, 2011·The Journal of Physical Chemistry. a·Esa VehmanenV A Apkarian
Oct 28, 2011·The Journal of Chemical Physics·Luis F GomezAndrey F Vilesov
Jul 22, 2015·Physical Review Letters·Jay JeffsAndrew M Ellis

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Citations

Feb 3, 2018·The Journal of Chemical Physics·Jordan FineAndrey F Vilesov
Apr 9, 2020·The Review of Scientific Instruments·L TiefenthalerP Scheier
Oct 16, 2020·Physical Chemistry Chemical Physics : PCCP·Wolfgang E Ernst, Andreas W Hauser
Apr 7, 2021·The Review of Scientific Instruments·P AggarwalA Zapara
May 17, 2021·Mass Spectrometry Reviews·Simon AlbertiniPaul Scheier

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