Observation of small long-lived diatomic dications BeH2+ and BeD2+

Klaus Franzreb, Richard C. Sobers, Jan Lörinčik, Peter Williams

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11 Scopus citations


The diatomic gas-phase dications BeH2+ and BeD2+ with only three electrons have been produced by Ar+ sputtering of a Be metal foil with exposure of the surface to toluene (C7 H8) or water (a mixture of D2O and H2O) vapor. BeH2+ and BeD2+ were observed and unambiguously identified by (mass)/(charge) determination in a magnetic sector mass spectrometer. They survived flight times of ∼4 μs. These observations confirm the discovery of BeD2+ in an atom-probe experiment by Barofsky and Müller [Surf. Sci. 10, 177 (1968)] and support theoretical predictions of long-lived metastable BeH2+.

Original languageEnglish (US)
Article number024701
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Issue number2
StatePublished - Feb 1 2005

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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