Femtosecond and nanosecond laser induced breakdown spectroscopic studies of NTO,HMX, and RDX |
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| Institution: | 1. Pacific Northwest National Laboratory, Richland, WA, United States;2. South Dakota School of Mines, Rapid City, SD, United States;3. Virginia Commonwealth University, Richmond, VA, United States;1. School of Mechanical Engineering, Xi''an Jiaotong University, Xi''an 710049, China;2. Graduate School of Advanced Technology and Science, Tokushima University, Tokushima 770-8501, Japan;3. State Key Laboratory of Multiphase Flow in Power Engineering, Xi''an Jiaotong University, Xi''an 710049, China;4. Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan |
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| Abstract: | We present our results from the laser induced breakdown spectroscopic studies of 5-Nitro-2,4-dihydro-3H-1,2,4-triazol-3-one (NTO), Octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine (HMX), and 1,3,5-Trinitroperhydro-1,3,5-triazine (RDX) investigated using nanosecond and femtosecond pulses. The presence of C, CN peaks in the spectra, signatures of high energy materials, was confirmed and persistence of emissions has been measured. Some of the Nitrogen peaks in fs LIBS spectra were found to be lower in magnitude (after normalization with N 868.60 nm peak) compared to the ns LIBS spectra. The presence of an additional CN peak in the fs spectra was identified for all samples. The ratio of CN peaks (388.28 nm, 387.08 nm, 386.16 nm) to C peak (247.82 nm), recorded with similar fluences, was discovered to be stronger in the fs case. Some of the possible mechanisms ensuing from our studies towards discrimination of such materials are outlined. |
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