Vol. 36, issue 01, article # 10

Abstract:

The paper presents the results of the experimental study of the dynamic characteristics of the laser fragmentation/laser-induced fluorescence (LF/LIF) process in nitrobenzene and para-nitrotoluene vapors under synchronized two-pulse laser irradiation. It is shown that if the values of the time delay between the pulses of fragmentation (248.4 nm) and excitation (247.87 nm) of NO-fragments are in the range 20–40 ns, the efficiency of the LF/LIF method can be increased by several times.

Keywords:

laser fragmentation, nitrotoluene, nitrobenzene, laser-induced fluorescence, nitric oxide, NO-fragments

References:

1. Lin M.-F., Lee Y.T., Ni C.-K., Xu S., Lin M.C. Photodissociation dynamics of nitrobenzene and o-nitrotoluene // J. Chem. Phys. 2007. V. 126, N 6. P. 064310-1–11.
2. Bobrovnikov S.M., Gorlov E.V., Zharkov V.I., Konurbaev O.R., Panchenko Yu.N., Puchikin A.V., Tivileva M.I. Eksperimental'noe issledovanie dinamiki protsessa lazernoj fragmentatsii parov nitrobenzola // Izv. vuzov. Fiz. 2020. V. 63, N 2. P. 123–128.
3. Galloway D.B., Bartz J.A., Huey L.G., Crim F.F. Pathways and kinetic energy disposal in the photodissociation of nitrobenzene // J. Chem. Phys. 1993. V. 98, N 3. P. 2107–2114.
4. Galloway D.B., Glenewinkel-Meyer T., Bartz J.A., Huey L.G., Crim F.F. The kinetic and internal energy of NO from the photodissociation of nitrobenzene // J. Chem. Phys. 1994. V. 100, N 3. P. 1946–1952.
5. Wu D.D., Singh J.P., Yueh F.Y., Monts D.L. 2,4,6-Trinitrotoluene detection by laser-photofragmentation–laser-induced fluorescence // Appl. Opt. 1996. V. 35, N 21. P. 3998–4003.
6. Swayambunathan V., Singh G., Sausa R.C. Laser photofragmentation–fragment detection and pyrolysis–laser-induced fluorescence studies on energetic materials // Appl. Opt. 1999. V. 38, N 30. P. 6447–6454.
7. Daugey N., Shu J., Bar I., Rosenwaks S. Nitrobenzene detection by one-color laser photolysis/laser induced fluorescence of NO (n = 0–3) // Appl. Spectrosc. 1999. V. 53, N 1. P. 57–64.
8. Shu J., Bar I., Rosenwaks S. Dinitrobenzene detection by use of one-color laser photolysis and laser-induced fluorescence of vibrationally excited NO // Appl. Opt. 1999. V. 38, N 21. P. 4705–4710.
9. Shu J., Bar I., Rosenwaks S. NO and PO photofragments as trace analyte indicators of nitrocompounds and organophosphonates // Appl. Phys. B. 2000. V. 71, N 5. P. 665–672.
10. Shu J., Bar I., Rosenwaks S. The use of rovibrationally excited NO photofragments as trace nitrocompounds indicators // Appl. Phys. B. 2000. V. 70, N 4. P. 621–625.
11. Arusi-Parpar T., Heflinger D., Lavi R. Photodissociation followed by laser-induced fluorescence at atmospheric pressure and 24°C: A unique scheme for remote detection of explosives // J. Appl. Opt. 2001. V. 40, N 36. P. 6677–6681.
12. Heflinger D., Arusi-Parpar T., Ron Y., Lavi R. Application of a unique scheme for remote detection of explosives // Opt. Commun. 2002. V. 204, N 1–6. P. 327–331.
13. Wynn C.M., Palmacci S., Kunz R.R., Zayhowski J.J., Edwards B., Rothschild M. Experimental demonstration of remote optical detection of trace explosives // Proc. SPIE. 2008. V. 6954. P. 695407. DOI: 10.1117/12.782371.
14. Arusi-Parpar T., Fastig S., Shapira J., Shwartzman B., Rubin D., Ben-Hamo Y., Englander A. Standoff Detection of explosives in open environment using enhanced photodissociation fluorescence // Proc. SPIE. 2010. V. 7684. P. 76840L–7. DOI: 10.1117/12.850911.
15. Wynn C.M., Palmacci S., Kunz R.R., Rothschild M. Noncontact detection of homemade explosive constituents via photodissociation followed by laser-induced fluorescence // Opt. Express. 2010. V. 18, N 6. P. 5399–5406.
16. Wynn C.M., Palmacci S., Kunz R.R., Aernecke M. Noncontact optical detection of explosive particles via photodissociation followed by laser-induced fluorescence // Opt. Express. 2011. V. 19, N 19. P. 18671–18677.
17. Bobrovnikov S.M., Gorlov E.V. Lidar method for remote detection of vapors of explosives in the atmosphere // Atmos. Ocean Opt. 2011. V. 24, N 3. P. 235–241.
18. Bobrovnikov S.M., Vorozhtsov A.B., Gorlov E.V., Zharkov V.I., Maksimov E.M., Panchenko Y.N., Sakovich G.V. Lidar detection of explosive vapors in the atmosphere // Russ. Phys. J. 2016. V. 58, N 9. P. 1217–1225.
19. Panchenko Y., Puchikin A., Yampolskaya S., Bobrovnikov S., Gorlov E., Zharkov V. Narrowband KrF Laser for Lidar Systems // IEEE J. Quantum Electron. 2021. V. 57, N 2. P. 1–5.