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https://open.uns.ac.rs/handle/123456789/12874
Title: | Time resolved laser induced fluorescence measurements: Considerations when using Nd:YAG based system | Authors: | Rabasovic M. Šević, Dragoljub Terzic M. Marinkovic B. |
Issue Date: | 15-May-2012 | Journal: | Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms | Abstract: | Time-resolved laser-induced fluorescence (TR-LIF) and the laser induced breakdown spectroscopy (LIBS) have been shown to be methods which are fast and sensitive to provide information about the constituents in analyzed samples. TR-LIF and LIBS have similar hardware requirements. In this paper, we analyze some characteristics of TR-LIF/LIBS system implemented in our laboratory, considering the fact that the excitation part of the system is based on Nd:YAG laser and Optical Parametric Oscillator (OPO). The laser is more than powerful enough (365 mJ at 1064 nm, variable OPO output >5 mJ) for LIBS, but somehow slow (the length of fundamental laser harmonic output pulse is about 5 ns) for fluorescence measurements in our present area of interest, namely plants and food products. Fortunately, the pulse length of tunable OPO output (320-475 nm) is less then 1 ns, so by means of a correct deconvolution procedure it is possible to measure the fluorescence lifetimes in the range as small as a few nanoseconds. The fluorescence detection part of our system is based on picosecond streak camera. Using the fluorescent dyes (Rhodamine B and Fluorescein) ethanol solutions we verified the analyzing capabilities of our TR-LIF system. © 2011 Elsevier B.V. All rights reserved. | URI: | https://open.uns.ac.rs/handle/123456789/12874 | ISSN: | 0168583X | DOI: | 10.1016/j.nimb.2011.10.017 |
Appears in Collections: | FTN Publikacije/Publications |
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