A method for determining the column density from the pressure-broadened resonance lines

Kiyoshi Ueda; O. Sonobe; H. Chiba; Y. Sato; T. Namioka; K. Ito

doi:10.1063/1.1143324

A method for determining the column density from the pressure-broadened resonance lines

Kiyoshi Ueda, O. Sonobe, H. Chiba, Y. Sato, T. Namioka, K. Ito

Division of Measurements

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3 Citations (Scopus)

Abstract

We have developed a method for determining metal-atom number-density integrated over a line-of-sight (i.e., the column density) by measuring the optical depth in the wings of the pressure-broadened resonance lines. This method is capable of monitoring the column density in situ during photoelectric absorption measurement of metal vapors in a synchrotron radiation beamline. The present method requires measuring the reduced absorption coefficients of the metal-metal and metal-buffer-gas collisional quasimolecules γ_MM and γ_MG and the effective vapor length l before its use. We thus describe also the procedure for obtaining γ_MM, γ_MG, and l using He-buffered Yb vapor as a specific example.

Original language	English
Pages (from-to)	1690-1694
Number of pages	5
Journal	Review of Scientific Instruments
Volume	63
Issue number	2
DOIs	https://doi.org/10.1063/1.1143324
Publication status	Published - 1992 Dec 1

ASJC Scopus subject areas

Instrumentation

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Ueda, K., Sonobe, O., Chiba, H., Sato, Y., Namioka, T., & Ito, K. (1992). A method for determining the column density from the pressure-broadened resonance lines. Review of Scientific Instruments, 63(2), 1690-1694. https://doi.org/10.1063/1.1143324

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T1 - A method for determining the column density from the pressure-broadened resonance lines

AU - Ueda, Kiyoshi

AU - Sonobe, O.

AU - Chiba, H.

AU - Sato, Y.

AU - Namioka, T.

AU - Ito, K.

PY - 1992/12/1

Y1 - 1992/12/1

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AB - We have developed a method for determining metal-atom number-density integrated over a line-of-sight (i.e., the column density) by measuring the optical depth in the wings of the pressure-broadened resonance lines. This method is capable of monitoring the column density in situ during photoelectric absorption measurement of metal vapors in a synchrotron radiation beamline. The present method requires measuring the reduced absorption coefficients of the metal-metal and metal-buffer-gas collisional quasimolecules γMM and γMG and the effective vapor length l before its use. We thus describe also the procedure for obtaining γMM, γMG, and l using He-buffered Yb vapor as a specific example.

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