Chlorine detection in cement with laser-induced breakdown spectroscopy in the infrared and ultraviolet spectral range

2009 ◽  
Vol 64 (10) ◽  
pp. 1135-1140 ◽  
Author(s):  
Christoph Dominic Gehlen ◽  
Eugen Wiens ◽  
Reinhard Noll ◽  
Gerd Wilsch ◽  
Kenji Reichling
Keyword(s):  
Spectral Range ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Laser-Induced Breakdown Spectroscopy for the On-Line Multielement Analysis of Highly Radioactive Glass Melt. Part I: Characterization and Evaluation of the Method

2002 ◽  
Vol 56 (4) ◽  
pp. 437-448 ◽  
Author(s):  
Jong-Il Yun ◽  
Reinhardt Klenze ◽  
Jae-Il Kim
Keyword(s):  
Spectral Range ◽  
Liquid Waste ◽  
Plasma Temperature ◽  
Multielement Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
High Level Liquid Waste ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
On Line ◽  
Echelle Spectrometer

Laser-induced breakdown spectroscopy (LIBS) is presented for the on-line multielement analysis of molten radioactive glass at a simulated vitrification process of high level liquid waste (HLLW). A plasma plume is produced by focusing the third harmonic of a Nd: YAG laser (λ = 355 nm) onto the glass melt surface at 1200 °C, and the plasma emission is guided via optical fiber and is characterized by an echelle spectrometer for the spectral range from 200 to 780 nm with a resolution of ±0.01 nm. Compared to a Czerny–Turner spectrometer, the echelle spectrometer appears distinctively superior for its broad operational spectral range and high resolution. The laser-induced plasma is found as optically thin and locally in thermodynamic equilibrium (LTE) as characterized by measuring the electron density and plasma temperature. The matrix temperature effect on the spectral emission is observed as significant, increasing the emission line intensities with increasing temperature, but differently from element to element. The applicability of LIBS is demonstrated on a laboratory scale with an inactive simulated HLLW glass melt for various analytical characteristics concerned.

Validity of Nanoparticle Enhanced Molecular Laser-induced Breakdown Spectroscopy

2021 ◽  
Author(s):  
Zhiyang Tang ◽  
Ke Liu ◽  
Zhongqi Hao ◽  
Kun Liu ◽  
Wen Zhang ◽  
...  
Keyword(s):  
Spectral Range ◽  
Visible Spectral Range ◽  
Laser Induced Breakdown Spectroscopy ◽  
Molecular Laser ◽  
Isotope Shifts ◽  
Breakdown Spectroscopy ◽  
Actual Application ◽  
Laser Induced Breakdown

Molecular Laser-induced breakdown spectroscopy (MLIBS) has received widespread attention due to its unique features, like larger isotope shifts and visible spectral range. However, the actual application has not been developed...

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

Characterization of Amethysts from Sukamara, Central Kalimantan, Using Laser-Induced Breakdown Spectroscopy (LIBS)

2020 ◽  
Vol 1 (2) ◽  
pp. 5-8
Author(s):  
Komang Gde Suastika, Heri Suyanto, Gunarjo, Sadiana, Darmaji
Keyword(s):  
Emission Intensity ◽  
Laser Energy ◽  
Emission Spectra ◽  
Atomic Emission ◽  
Laser Induced Breakdown Spectroscopy ◽  
Chemical Formula ◽  
Central Kalimantan ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Abstract - Laser-Induced Breakdown Spectroscopy (LIBS) is one method of atomic emission spectroscopy using laser ablation as an energy source. This method is used to characterize the type of amethysts that originally come from Sukamara, Central Kalimantan. The result of amethyst characterization can be used as a reference for claiming the natural wealth of the amethyst. The amethyst samples are directly taken from the amethyst mining field in the District Gem Amethyst and consist of four color variations: white, black, yellow, and purple. These samples were analyzed by LIBS, using laser energy of 120 mJ, delay time detection of 2 μs and accumulation of 3, with and without cleaning. The purpose of this study is to determine emission spectra characteristics, contained elements, and physical characteristics of each amethyst sample. The spectra show that the amethyst samples contain some elements such as Al, Ca, K, Fe, Gd, Ba, Si, Be, H, O, N, Cl and Pu with various emission intensities. The value of emission intensity corresponds to concentration of element in the sample. Hence, the characteristics of the amethysts are based on their concentration value. The element with the highest concentration in all samples is Si, which is related to the chemical formula of SiO2. The element with the lowest concentration in all samples is Ca that is found in black and yellow amethysts. The emission intensity of Fe element can distinguish between white, purple, and yellow amethyst. If Fe emission intensity is very low, it indicates yellow sample. Thus, we may conclude that LIBS is a method that can be used to characterize the amethyst samples.Key words: amethyst, impurity, laser-induced, breakdown spectroscopy, characteristic, gemstones

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