Photodissociation followed by laser-induced fluorescence at atmospheric pressure and 24 °C:: a unique scheme for remote detection of explosives

被引：67

作者：

Arusi-Parpar, T ^{[1
]}

Heflinger, D ^{[1
]}

Lavi, R ^{[1
]}

机构：

[1] Soreq Nucl Res Ctr, Electroopt Div, Nonlinear Opt Grp, IL-81800 Yavne, Israel

来源：

APPLIED OPTICS | 2001年 / 40卷 / 36期

关键词：

D O I：

10.1364/AO.40.006677

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A unique scheme has been applied for sensitive remote detection of 2,4,6-trinitrotoluene (TNT) vapor trace amounts at atmospheric pressure and 24 degreesC. The detection concept is based on a single laser beam inducing a tandem process: photodissociation of TNT vapor followed by highly selective detection of its photofragments vibrationally excited NO, utilizing laser-induced fluorescence with the A(2)Sigma (+)(upsilon' = 0) <-- X(2)Pi(upsilon " = 2) transition. A detection sensitivity of at least 8 parts in 10(9) of TNT vapor with a signal-to-noise ratio of approximately 10 has been experimentally verified for an unfocused similar to5-mJ laser beam, measured at a distance of similar to 15 cm from the TNT sample. (C) 2001 Optical Society of America.

引用

页码：6677 / 6681

页数：5

共 25 条

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