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Highly Charged Droplets of Superfluid Helium

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journal contribution
posted on 24.10.2019, 08:25 by Felix Laimer, Lorenz Kranabetter, Lukas Tiefenthaler, Simon Albertini, Fabio Zappa, Andrew M. Ellis, Michael Gatchell, Paul Scheier
We report on the production and study of stable, highly charged droplets of superfluid helium. Using a novel experimental setup we produce neutral beams of liquid helium nanodroplets containing millions of atoms or more that can be ionized by electron impact, mass-per-charge selected, and ionized a second time before being analyzed. Droplets containing up to 55 net positive charges are identified and the appearance sizes of multiply charge droplets are determined as a function of the charge state. We show that the droplets are stable on the millisecond timescale of the experiment and decay through the loss of small charged clusters, not through symmetric Coulomb explosions.

Funding

This work was supported by the EU commission, EFRE K-Regio FAENOMENAL EFRE 2016-4, the Austrian Science Fund FWF (P31149 and W1259) and the Swedish Research Council (Contract No. 2016-06625). F. Z. acknowledges support from Brazilian agency CNPq.

History

Citation

Physical Review Letters, 2019, 123 (16)

Author affiliation

/Organisation/COLLEGE OF SCIENCE AND ENGINEERING/Department of Chemistry

Version

VoR (Version of Record)

Published in

Physical Review Letters

Publisher

American Physical Society

issn

0031-9007

eissn

1079-7114

Copyright date

2019

Available date

24/10/2019

Publisher version

https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.123.165301

Language

en