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Proceedings Paper

Attempt to verify experimental Einstein A-coefficient used for O2(1Δg) determination in COIL
Author(s): Otomar Spalek; Jarmila Kodymova; Vaclav Balek; Pavel Stopka; Ivo Micek
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Paper Abstract

This paper is a contribution to the current discussion on radiative lifetime, or the Einstein coefficient for spontaneous emission of singlet delta oxygen [O2(1(Delta) g)]. A verification of widely-used the A-coefficient by Badger et al. (2.58 X 10-4 s-1) in emission spectroscopy for determination of O2(1(Delta) g) concentration in Chemical Oxygen-Iodine Laser (COIL) was examined. Two independent comparative techniques, the EPR and emission spectroscopy, completed by a proposed mathematical model for calculation of O2(1(Delta) g) concentration from emission measurements, were employed. Singlet oxygen was generated chemically by a conventional way used in COIL. Within the accuracy of the both experimental techniques, the value of the Einstein A-coefficient estimated by this investigation is equal to (2.31 plus or minus 0.51) X 10-4 s-1, that is slightly less than the Badger et al. value.

Paper Details

Date Published: 22 December 1998
PDF: 10 pages
Proc. SPIE 3574, XII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (22 December 1998); doi: 10.1117/12.334488
Show Author Affiliations
Otomar Spalek, Institute of Physics and Institute of Inorganic Chemistry (Czech Republic)
Jarmila Kodymova, Institute of Physics (Czech Republic)
Vaclav Balek, Institute of Physics (Czech Republic)
Pavel Stopka, Institute of Inorganic Chemistry (Czech Republic)
Ivo Micek, Institute of Inorganic Chemistry (Czech Republic)


Published in SPIE Proceedings Vol. 3574:
XII International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference
Anatoly S. Boreisho; Gennady A. Baranov, Editor(s)

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