OSA's Digital Library

Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 24 — Aug. 20, 2006
  • pp: 6180–6186

Pulsed laser photofragment emission for detection of mercuric chloride

Alexandra A. Hoops and Thomas A. Reichardt  »View Author Affiliations


Applied Optics, Vol. 45, Issue 24, pp. 6180-6186 (2006)
http://dx.doi.org/10.1364/AO.45.006180


View Full Text Article

Enhanced HTML    Acrobat PDF (160 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations

Abstract

The viability of pulsed laser photofragment emission (PFE) is evaluated for the in situ measurement of vapor-phase mercuric chloride ( HgCl 2 ) concentration in combustion flue gas. Dispersed emissions from both the Hg ( 6 P 1 3 ) and HgCl ( B Σ + 2 ) photoproducts are presented, and the dependence of the HgCl 2 PFE signal originating from Hg ( 6 P 1 3 ) on the collisional environment is examined for buffer-gas mixtures of N 2 , O 2 , and CO 2 . Integrated PFE intensity measurements as a function of buffer gas pressure support the assumption that the primary effect of the relevant flue gas constituents is to quench emission from Hg ( 6 P 1 3 ) . The quenching rate constants for PFE from HgCl 2 were measured to be 1.37 ( ± 0.16 ) × 10 5 Torr 1 s 1 for N 2 , 9.35 ( ± 0.25 ) × 10 6 Torr 1 s 1 for O 2 , and 1.49 ( ± 0.29 ) × 10 6 Torr 1 s 1 for CO 2 . These values are in good accord with literature values for the quenching of Hg ( 6 P 1 3 ) . The emission cross section for Hg ( 6 P 1 3 ) generated by photodissociation of HgCl 2 in 760   Torr   N 2 is found to be 1.0 ( ± 0.2 ) × 10 25 m 2 by comparing the PFE signal to N 2 Raman scattering.

© 2006 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.2530) Spectroscopy : Fluorescence, laser-induced

History
Original Manuscript: September 30, 2005
Revised Manuscript: February 24, 2006
Manuscript Accepted: February 27, 2006

Citation
Alexandra A. Hoops and Thomas A. Reichardt, "Pulsed laser photofragment emission for detection of mercuric chloride," Appl. Opt. 45, 6180-6186 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-24-6180

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited