Molecular Beam Scattering from Liquid Surfaces

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Science  07 Jun 1991:
Vol. 252, Issue 5011, pp. 1421-1424
DOI: 10.1126/science.252.5011.1421


By means of controlled collisions of atoms and molecules with liquid surfaces, molecular beam experiments can be used to probe how gases stick to, rebound from, and exchange energy with molecules in the liquid phase. This report describes measurements of energy exchange in collisions between gases (neon, xenon, and sulfur hexafluoride) and polyatomic liquids (squalane and perfluoropolyether). Energy transfer depends critically on liquid composition and is more efficient for the hydrocarbon than for the perfluorinated ether.

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