Homem MGP, Iga I, Sugohara RT, Sanches IP, Lee MT. Role of adsorption effects on absolute electron-molecule cross-section calibration using the relative flow technique.
Rev Sci Instrum 2011;
82:013109. [PMID:
21280818 DOI:
10.1063/1.3525799]
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Abstract
In this work, we report an experimental investigation on relative flow-rate determination for vapors. The mechanism of adsorption-desorption of vapors on surfaces is considered. In contrast to previous investigations, our study shows that the adsorption of vapors on surfaces may significantly affect the flow-rate determination and consequently the measured cross sections. Particularly, for water, it can result in an overestimation of 35% in the cross sections.
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