Communication: Barium ions and helium nanodroplets: solvation and desolvation

The solvation of Ba(+) ions created by the photoionization of barium atoms located on the surface of helium nanodroplets has been investigated. The excitation spectra corresponding to the 6p (2)P(1/2) ← 6s (2)S(1/2) and 6p (2)P(3/2) ← 6s (2)S(1/2) transitions of Ba(+) are found to be identical to th...

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Bibliographic Details
Published in:The Journal of chemical physics 2012-08, Vol.137 (5), p.051102-051102
Main Authors: Zhang, Xiaohang, Drabbels, Marcel
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
BARIUM IONS
DROPLETS
EXCITATION
Excitation spectra
EXCITED STATES
HELIUM
HELIUM IONS
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
MASS SPECTRA
Mass spectroscopy
Nanocomposites
Nanomaterials
Nanostructure
PHOTOIONIZATION
PHOTON-ATOM COLLISIONS
SOLVATION
TIME-OF-FLIGHT METHOD
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Summary:The solvation of Ba(+) ions created by the photoionization of barium atoms located on the surface of helium nanodroplets has been investigated. The excitation spectra corresponding to the 6p (2)P(1/2) ← 6s (2)S(1/2) and 6p (2)P(3/2) ← 6s (2)S(1/2) transitions of Ba(+) are found to be identical to those recorded in bulk He II [H. J. Reyher, H. Bauer, C. Huber, R. Mayer, A. Schafer, and A. Winnacker, Phys. Lett. A 115, 238 (1986)], indicating that the ions formed at the surface of the helium droplets become fully solvated by the helium. Time-of-flight mass spectra suggest that following the excitation of the solvated Ba(+) ions, these are being ejected from the helium droplets either as bare Ba(+) ions or as small Ba(+)He(n) (n < 20) complexes.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.4743900