Abstract
The effect of the vapor temperature on the nucleation of zinc from the vapor phase onto substrates of mica, lithium fluoride, and Pyrex glass was investigated with a double-Knudsen-cell technique. There was some effect of beam temperature on the critical supersaturation for nucleation on all three substrates. For the glass substrate the critical supersaturation was determined as a function of beam temperature and was found to agree well with earlier measurements by Hudson if the model of disk-shaped nuclei is assumed. The results indicated that the thermal accommodation coefficient for zinc on Pyrex is aT=0.78 in the range 600°—800°K.
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