Abstract

A technique for a fast and reliable determination of the lifetime of atomic metastable states in combustive situations, based on the laser-enhanced ionization technique, is developed. The typical time required for a determination of the lifetime of an atomic metastable state in a given local position in a combustive situation ranges from some seconds to a minute (depending on the signal-to-noise ratio). The lifetime of the lowest metastable state in Au in an acetylene–air flame, which is used as the pilot metastable state in this paper, was found to vary over one order of magnitude (between 600 ns and 8.8 μs), depending on the local stoichiometric conditions in the probe volume (which, in turn, is a function of the probing position and the fuel–air ratio fed to the flame). It is demonstrated that the probing of the lifetime of atomic metastable states by this new technique can thus be used as a sensitive tool for mapping local stoichiometric conditions in a flame.

© 1993 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Measurements of hydroxyl concentrations and lifetimes in laminar flames using picosecond time-resolved laser-induced fluorescence

Thomas A. Reichardt, Michael S. Klassen, Galen B. King, and Normand M. Laurendeau
Appl. Opt. 35(12) 2125-2139 (1996)

Experiments concerning resonance-enhanced multiphoton ionization probe measurements of flame-species profiles

Asa Fein, Jeffrey S. Bernstein, Xiao-Mei Song, and Terrill A. Cool
Appl. Opt. 33(21) 4889-4898 (1994)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (6)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription