Optimal buffer gas pressure for laser-induced fluorescence detection of the iodine-129 isotope in the atmosphere

Journal Article · Thu Jun 01 00:00:00 EDT 1995 · Optics and Spectroscopy

OSTI ID:135847

Kireev, S V; Pit`ko, A V; Shnyrev, S L ^[1]

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1. Moscow Institute of Engineering Physics (Russian Federation)

The effect of atmospheric air pressure on the intensity of iodine-129 vapor fluorescence excited by a He-Ne (633 nm) laser is studied. It is shown that to achieve the maximum intensity of fluorescence of molecular iodine-129, it is advantageous, first, to use a {sup 3}He-{sup 20}Ne laser for excitation, and second, to detect atmospheric iodine impurities in the gas mixture under analysis evacuated to 2 x 10{sup 18} - 4 x 10{sup 18} mol/cm{sup 3}. In this case, the sensitivity increases about twofold. 7 refs., 4 figs.

• OSTI ID: 135847
• Journal Information: Optics and Spectroscopy, Vol. 78, Issue 6; Other Information: PBD: Jun 1995; TN: Translated from Optika i Spektroskopiya; 78: No. 6, 891-894(1995)
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
IODINE 129
FLUORESCENCE SPECTROSCOPY
ATMOSPHERIC PRESSURE
LASER RADIATION
HELIUM-NEON LASERS
PRESSURE DEPENDENCE