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Proceedings Paper

Femtosecond LIBS studies of nitropyrazoles
Author(s): E. Nageswara Rao; Sreedhar Sunku; Surya P. Tewari; G. Manoj Kumar; S. Venugopal Rao
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Paper Abstract

We present our initial experimental results from the LIBS studies of pyrazole, 1-nitropyrazole, 3-nitropyrazole, 3,4- dinitropyrazole and 1-methyl- 3,4,5 trinitro pyrazole recorded with femtosecond pulses and performed in argon atmosphere. CN molecular bands in three different spectral regions of 357 nm-360 nm, 384 nm-389 nm and 414 nm -423 nm, C2 swan bands near 460 nm-475 nm, 510 nm– 520 nm and 550 nm-565 nm were observed. The C peak at 247.82 nm, H peak at 656.2 nm have also been observed along with several peaks of O and N. CN/C2, CN/C, C2/C and C2/N ratios were measured from the average of 25 spectra obtained in argon. The effect of number of nitro groups on the atomic and molecular emission has been evaluated. A gate delay of 100 ns and a gate width of 800 ns were used for collecting the spectra.

Paper Details

Date Published: 29 May 2013
PDF: 9 pages
Proc. SPIE 8710, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV, 87101O (29 May 2013); doi: 10.1117/12.2015760
Show Author Affiliations
E. Nageswara Rao, Univ. of Hyderabad (India)
Sreedhar Sunku, Univ. of Hyderabad (India)
Surya P. Tewari, Univ. of Hyderabad (India)
G. Manoj Kumar, Univ. of Hyderabad (India)
S. Venugopal Rao, Univ. of Hyderabad (India)

Published in SPIE Proceedings Vol. 8710:
Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XIV
Augustus Way Fountain III, Editor(s)

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