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  Extreme ultraviolet ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization, and electron energy-loss spectra

Buchta, D., Krishnan, S. R., Brauer, N. B., Drabbels, M., O’Keeffe, P., Devetta, M., et al. (2013). Extreme ultraviolet ionization of pure He nanodroplets: Mass-correlated photoelectron imaging, Penning ionization, and electron energy-loss spectra. Journal of Chemical Physics, 139(8): 084301. doi:10.1063/1.4818531.

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Buchta, D., Author
Krishnan, Siva Rama1, Author           
Brauer, N. B., Author
Drabbels, M., Author
O’Keeffe, P., Author
Devetta, M., Author
Fraia, M. Di, Author
Callegari, C., Author
Richter, R., Author
Coreno, M., Author
Prince, K. C., Author
Stienkemeier, F., Author
Ullrich, J.1, Author           
Moshammer, R.1, Author           
Mudrich, M., Author
Affiliations:
1Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Society, ou_904547              

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 Abstract: The ionization dynamics of pure He nanodroplets irradiated by Extreme ultraviolet radiation is studied using Velocity-Map Imaging PhotoElectron-PhotoIon COincidence spectroscopy. We present photoelectron energy spectra and angular distributions measured in coincidence with the most abundant ions He+, He 2+, and He 3+. Surprisingly, below the autoionization threshold of He droplets, we find indications for multiple excitation and subsequent ionization of the droplets by a Penning-like process. At high photon energies we observe inelastic collisions of photoelectrons with the surrounding He atoms in the droplets.

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Language(s): eng - English
 Dates: 2013-08-22
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1063/1.4818531
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Title: Journal of Chemical Physics
  Abbreviation : J. Chem. Phys
Source Genre: Journal
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Pages: - Volume / Issue: 139 (8) Sequence Number: 084301 Start / End Page: - Identifier: -