Optical determination of alkali metal vapor number density in the vicinity (∼10-5cm) of cell surfaces

Kaifeng Zhao, Z. Wu, H. M. Lai

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Abstract

We describe a method for determining the number density of the alkali metal vapor by use of an evanescent wave in a single total internal reflection. The method is simple to use, and it has the following useful features: It is most suitable for determining the number density of dense (>1013 cm-3) alkali metal vapor and it permits the measurement of the alkali metal vapor number density in the vicinity (∼10-5cm) of cell surfaces. Using this method, we measured the number density of Rb metal vapor in the vicinity (∼10-5cm) of the cell wall in cells that contain only Rb metal and no buffer gas; we found that there is no systematic difference between the Rb number density near the surface and that in the bulk.

Original languageEnglish (US)
Pages (from-to)1904-1910
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Volume18
Issue number12
DOIs
StatePublished - Dec 2001

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All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

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