Vibrational excitation in He+(H2O)11 collisions

Quantum calculations and experiment

J. Brudermann, U. Buck, E. Fredj, R. B. Gerber, Mark A Ratner

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Helium atoms are scattered from a beam of water clusters with mean size n = 10 in an angular and velocity resolved collision experiment. The measured peaks are identified as elastic scattering, rotationally inelastic scattering of monomers, and vibrational excitation of the clusters. To interpret the latter processes quantum calculations are performed for He-(H2O)11 collisions using the TDSCF approximation which includes the anharmonic force field of the water clusters and energy transfer between the modes. By comparison of the calculated and experimental results, the most probable excitations correspond to energy transfer for around 7 meV and, with smaller intensities, up to 20 meV. The excitations correspond to shearing modes of the outer rings and the middle ring of the highly nonrigid cluster against each other.

Original languageEnglish
Pages (from-to)10069-10076
Number of pages8
JournalJournal of Chemical Physics
Volume111
Issue number22
Publication statusPublished - Dec 8 1999

Fingerprint

Energy transfer
Helium
Inelastic scattering
collisions
Elastic scattering
Water
Shearing
excitation
Monomers
Experiments
energy transfer
Atoms
rings
helium atoms
shearing
water
field theory (physics)
elastic scattering
inelastic scattering
monomers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Vibrational excitation in He+(H2O)11 collisions : Quantum calculations and experiment. / Brudermann, J.; Buck, U.; Fredj, E.; Gerber, R. B.; Ratner, Mark A.

In: Journal of Chemical Physics, Vol. 111, No. 22, 08.12.1999, p. 10069-10076.

Research output: Contribution to journalArticle

Brudermann, J, Buck, U, Fredj, E, Gerber, RB & Ratner, MA 1999, 'Vibrational excitation in He+(H2O)11 collisions: Quantum calculations and experiment', Journal of Chemical Physics, vol. 111, no. 22, pp. 10069-10076.
Brudermann, J. ; Buck, U. ; Fredj, E. ; Gerber, R. B. ; Ratner, Mark A. / Vibrational excitation in He+(H2O)11 collisions : Quantum calculations and experiment. In: Journal of Chemical Physics. 1999 ; Vol. 111, No. 22. pp. 10069-10076.
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