Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Observation of doubly charged Ne2 molecular ions by field desorption


Drachsel,  Wolfgang
Fritz Haber Institute, Max Planck Society;


Block,  Jochen H.
Fritz Haber Institute, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Tessner, T., Drachsel, W., Dirks, J., & Block, J. H. (1994). Observation of doubly charged Ne2 molecular ions by field desorption. International Journal of Mass Spectrometry and Ion Processes, 134(2-3), 161-168. doi:10.1016/0168-1176(94)03969-0.

Cite as: https://hdl.handle.net/21.11116/0000-0009-9460-3
Using an isotopic mixture of 20Ne/22Ne = 1 : 1 as an imaging gas for a tungsten field emitter tip, simultaneous emission of two Ne field ions as well as a small Ne2+2 yield was observed and characterized. The onset of the Ne dimer detection corresponds to an increase in the Ne surface coverage, which suggests that a second adsorption layer may exist. For increasing field strengths above 4 V Å−1 decreasing activation energies of desorption for the surface dimer are obtained as a function of field strength. This gives experimental support for the theoretical calculations of activation energies of field desorption for He, Ne, and Ar adatoms from a tungsten surface.