Determination of Accommodation Coefficients for N2 at Disk-Drive Air-Bearing Surfaces

1997 ◽  
Vol 119 (3) ◽  
pp. 588-589 ◽  
Author(s):  
C. T. Rettner
Keyword(s):  
Room Temperature ◽  
Molecular Beam ◽  
Disk Drive ◽  
Angular Distributions ◽  
Air Bearing ◽  
Molecular Beam Scattering ◽  
Beam Scattering ◽  
Accommodation Coefficients ◽  
Tangential Momentum

Thermal and tangential momentum accommodation coefficients have been obtained for N2 colliding with various surfaces of relevance to the disk-drive air bearing using molecular beam scattering techniques. Analysis of the velocity and angular distributions of scattered species indicates that N2 is essentially fully accommodated at the relevant surfaces for energies characteristic of room temperature gas.

Gaas Etching by C12 and HCI: Ga- vs. As- Limited Etching

1993 ◽  
Vol 334 ◽  
Author(s):  
Chaochin Su ◽  
Zi-Guo Dai ◽  
Hui-Qi Hou ◽  
Ming Xi ◽  
Matthew F. Vernon ◽  
...  
Keyword(s):  
Surface Analysis ◽  
Room Temperature ◽  
Molecular Beam ◽  
Molecular Beam Scattering ◽  
Analysis Techniques ◽  
Surface Analysis Techniques ◽  
Beam Scattering ◽  
Two Systems ◽  
Measurable Rate ◽  
Kinetics Of

AbstractResults in the literature indicate that C12 etches GaAs at room temperature but HCl etches GaAs at a measurable rate only at temperatures above ∼670 K. In this work, molecular beam scattering and surface analysis techniques have been applied to address the fundamental kinetic differences between these two systems. The results indicate that the onset of GaAs etching by C12 is determined by the kinetics of Ga-removal as GaC13 while etching by HCl is limited by As evaporation as As2. The results also suggest that HCl selectively etches gallium from GaAs at temperatures between 600 and 650 K.

Molecular beam scattering experiments on the reaction K + RbCl: Absolute angular distributions and integral cross sections

1974 ◽  
Vol 61 (12) ◽  
pp. 5381-5388 ◽  
Author(s):  
G. Aniansson ◽  
R. P. Creaser ◽  
W. D. Held ◽  
L. Holmlid ◽  
J. P. Toennies
Keyword(s):  
Cross Sections ◽  
Molecular Beam ◽  
Angular Distributions ◽  
Molecular Beam Scattering ◽  
Beam Scattering
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