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Title: Internal energy dependence of molecular condensation coefficients determined from molecular beam surface scattering experiments

Abstract

An experiment was performed which confirms the existence of an internal mode dependence of molecular sticking probabilities for collisions of molecules with a cold surface. The scattering of a velocity selected effusive beam of CCl{sub 4} from a 90 K CC1{sub 4} ice surface has been studied at five translational velocities and for two different internal temperatures. At a surface temperature of 90 K (approx. 99% sticking probability) a four fold increase in reflected intensity was observed for the internally excited (560 K) CC1{sub 4} relative to the room temperature (298 K) CC1{sub 4} at a translational velocity of 2.5 X 10{sup 4} cm/sec. For a surface temperature of 90 K all angular distributions were found to peak 15{sup 0} superspecularly independent of incident velocity.

Authors:
;
Publication Date:
Research Org.:
California Univ., Berkeley (USA). Lawrence Berkeley Lab.
Sponsoring Org.:
US Department of Energy (DOE)
OSTI Identifier:
6403272
Report Number(s):
LBL-7395; CONF-780728-3
TRN: 79-004364
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 11. symposium on rarefied gas dynamics, Cannes, France, 3 Jul 1978
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CARBON TETRACHLORIDE; COLLISIONS; MOLECULE COLLISIONS; ANGULAR DISTRIBUTION; ENERGY DEPENDENCE; MOLECULAR BEAMS; PROBABILITY; REFLECTION; SURFACES; BEAMS; CHLORINATED ALIPHATIC HYDROCARBONS; DISTRIBUTION; HALOGENATED ALIPHATIC HYDROCARBONS; ORGANIC CHLORINE COMPOUNDS; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; Sticking probability, reflection intensity, angular distribution, and carbon tetrachloride, atomic, molecular and chemical physics; 640301* - Atomic, Molecular & Chemical Physics- Beams & their Reactions

Citation Formats

Sibener, S.J., and Lee, Y.T. Internal energy dependence of molecular condensation coefficients determined from molecular beam surface scattering experiments. United States: N. p., 1978. Web.
Sibener, S.J., & Lee, Y.T. Internal energy dependence of molecular condensation coefficients determined from molecular beam surface scattering experiments. United States.
Sibener, S.J., and Lee, Y.T. Mon . "Internal energy dependence of molecular condensation coefficients determined from molecular beam surface scattering experiments". United States. doi:. https://www.osti.gov/servlets/purl/6403272.
@article{osti_6403272,
title = {Internal energy dependence of molecular condensation coefficients determined from molecular beam surface scattering experiments},
author = {Sibener, S.J. and Lee, Y.T.},
abstractNote = {An experiment was performed which confirms the existence of an internal mode dependence of molecular sticking probabilities for collisions of molecules with a cold surface. The scattering of a velocity selected effusive beam of CCl{sub 4} from a 90 K CC1{sub 4} ice surface has been studied at five translational velocities and for two different internal temperatures. At a surface temperature of 90 K (approx. 99% sticking probability) a four fold increase in reflected intensity was observed for the internally excited (560 K) CC1{sub 4} relative to the room temperature (298 K) CC1{sub 4} at a translational velocity of 2.5 X 10{sup 4} cm/sec. For a surface temperature of 90 K all angular distributions were found to peak 15{sup 0} superspecularly independent of incident velocity.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 1978},
month = {Mon May 01 00:00:00 EDT 1978}
}

Conference:
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