Evaporation and scattering of neon, methane, and water from a dodecane flat liquid jet.

Autor:	Yang W; Department of Chemistry, University of California, Berkeley, California 94720, USA.; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Lee C; Department of Chemistry, University of California, Berkeley, California 94720, USA.; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Saric S; Department of Chemistry, University of California, Berkeley, California 94720, USA.; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Pohl MN; Department of Chemistry, University of California, Berkeley, California 94720, USA.; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA., Neumark DM; Department of Chemistry, University of California, Berkeley, California 94720, USA.; Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Jazyk:	angličtina
Zdroj:	The Journal of chemical physics [J Chem Phys] 2023 Aug 07; Vol. 159 (5).
DOI:	10.1063/5.0159796
Abstrakt:	The evaporation and scattering of Ne, CD4, and D2O from a dodecane flat liquid jet are investigated in a molecular beam apparatus. The experiment yields translational energy distributions as a function of scattering angle by means of a rotatable mass spectrometer. In the evaporation experiments, one observes a Maxwell-Boltzmann distribution with a cos θ angular distribution superimposed on a weak, isotropic background. The scattering experiments show contributions from impulsive scattering and thermal desorption. At select incident angles for the three systems, angular distributions show super-specular scattering for the impulsive scattering channel, an effect attributed to anisotropic momentum transfer to the liquid surface. The impulsive scattering channel is analyzed with a soft-sphere model to explore energy transfer between the scatterer and liquid as a function of deflection angle. Compared to Ne scattering, the polyatomic gases exhibit more thermal desorption and, in the impulsive scattering channel, a higher degree of internal excitation. (© 2023 Author(s). Published under an exclusive license by AIP Publishing.)
Databáze:	MEDLINE
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