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Published September 1984 | public
Journal Article

Low-level vibrational relaxation in single gas-surface encounters. Molecular structure, surface, and temperature effects


Direct measurement of the vibrational temperatures attained by different gases after single encounters with hot silica or platinum surfaces at T_S have been obtained by modulated-beam mass spectrometry. Vibrational energy accommodation coefficients a, for n-butane, n-octane, and 1-chlorobutane are smaller than one over both surfaces, slightly increase with molecular size or polarity, and are nearly independent of T_S between 350 and 700 K. Relaxation is more efficient on platinum.

Additional Information

© 1984 American Chemical Society. (Received: February 24, 1984) This work was supported by grants from CIC, SUBCYT, and CONICET of Argentina.

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October 23, 2023