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Molecular Beam Scattering from Liquid Surfaces

1991; American Association for the Advancement of Science; Volume: 252; Issue: 5011 Linguagem: Inglês

10.1126/science.252.5011.1421

1095-9203

Mary E. Saecker, Steven T. Govoni, Daniel V. Kowalski, Mackenzie E. King, Gilbert M. Nathanson,

Quantum, superfluid, helium dynamics

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.