Study of atomic and molecular emission spectra of Sr by laser induced breakdown spectroscopy (LIBS)

2015 ◽  
Vol 54 (34) ◽  
pp. 10264 ◽  
Author(s):  
Chet. R. Bhatt ◽  
Bader Alfarraj ◽  
Krishna K. Ayyalasomayajula ◽  
Charles Ghany ◽  
Fang Y. Yueh ◽  
...  
Keyword(s):  
Emission Spectra ◽  
Laser Induced Breakdown Spectroscopy ◽  
Molecular Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Molecular laser-induced breakdown spectroscopy for elemental analysis

2017 ◽  
Vol 84 (1) ◽  
Author(s):  
Anne-Sophie Rother ◽  
Thomas Dietz ◽  
Peter Kohns ◽  
Georg Ankerhold
Keyword(s):  
Emission Spectra ◽  
Visible Spectral Region ◽  
Detection Sensitivity ◽  
Laser Induced Breakdown Spectroscopy ◽  
Time Resolved ◽  
Molecular Emission ◽  
Breakdown Spectroscopy ◽  
Characteristic Emission ◽  
Laser Induced Breakdown ◽  
Cooling Phase

AbstractLaser-induced breakdown spectroscopy (LIBS) with pulsed laser excitation is a well-established method for analyzing the atomic components of an unknown sample based on their characteristic emission spectra. However, standard LIBS analysis provides insufficient results if the atoms to be measured exhibit weak elemental emission lines or if characteristic elemental spectra are disturbed by overlapping stronger lines of other elements in the sample. The analysis of the molecular emission bands arising in the plasma cooling phase seems to be a promising solution. The analysis is carried out by the observation of newly formed radicals and diatomic molecules whose strong molecular emission bands can often be found in the visible spectral region and offer a higher detection sensitivity. This generally requires a time resolved measurement of the LIBS spectra, but we show that in some cases this is not necessarily needed. As an application we present the measurement of chloride contamination in concrete that could help to estimate the repair demand of infrastructure buildings in future.

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

Determination of fluorine in copper ore using laser-induced breakdown spectroscopy assisted by the SrF molecular emission band

2020 ◽  
Vol 35 (4) ◽  
pp. 754-761 ◽  
Author(s):  
Zhiyang Tang ◽  
Ran Zhou ◽  
Zhongqi Hao ◽  
Wen Zhang ◽  
Qingzhou Li ◽  
...  
Keyword(s):  
Emission Band ◽  
Molecular Band ◽  
Atomic Line ◽  
Laser Induced Breakdown Spectroscopy ◽  
Copper Ore ◽  
Molecular Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

The SrF molecular band as an alternative to the fluorine atomic line was proposed to detect fluorine in copper ore using LIBS technology in air.

scholarly journals High sensitivity hydrogen analysis in zircaloy-4 using helium-assisted excitation laser-induced breakdown spectroscopy

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Marincan Pardede ◽  
Indra Karnadi ◽  
Rinda Hedwig ◽  
Ivan Tanra ◽  
Javed Iqbal ◽  
...  
Keyword(s):  
Excited State ◽  
Nuclear Power ◽  
Emission Spectra ◽  
Target Material ◽  
High Sensitivity ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Low Concentrations ◽  
Laser Induced Breakdown ◽  
Excitation Laser

AbstractHigh-sensitivity detection of hydrogen (H) contained in zircaloy-4, a commonly used material for nuclear fuel containers, is crucial in a nuclear power plant. Currently, H detection is performed via gas chromatography, which is an offline and destructive method. In this study, we developed a technique based on metastable excited-state He-assisted excitation to achieve excellent quality of H emission spectra in double-pulse orthogonal laser-induced breakdown spectroscopy (LIBS). The production of metastable excited-state He atoms is optimized by using LiF as sub-target material. The results show a narrow full-width-at-half-maximum of 0.5 Å for the H I 656.2 nm emission line, with a detection limit as low as 0.51 mg/kg. Thus, using this novel online method, H in zircaloy-4 can be detected efficiently, even at very low concentrations.

Laser-Induced Breakdown Spectroscopy for Polymer Identification

1998 ◽  
Vol 52 (3) ◽  
pp. 456-461 ◽  
Author(s):  
R. Sattmann ◽  
I. Mönch ◽  
H. Krause ◽  
R. Noll ◽  
S. Couris ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Emission Spectra ◽  
Low Density Polyethylene ◽  
Laser Induced Breakdown Spectroscopy ◽  
Spectral Features ◽  
Low Density ◽  
Plasma Emission ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Polymer Type

Laser-induced breakdown spectroscopy has been applied to polymer samples in order to investigate the possibility of using this method for the identification of different materials. The plasma emission spectra of high-density polyethylene (HDPE), low-density polyethylene (LDPE), polyvinyl chloride (PVC), polyethylene terephthalate (PET), and polypropylene (PP) have been studied. Spectral features have been measured—for example, the 725.7 nm chlorine line, the 486.13 mm Hβ line, and the 247.86 nm carbon line—whose evaluation with neural networks permits identification accuracies between 90 and 100%, depending on polymer type.

Identifying laser-induced plasma emission spectra of particles in a gas–solid flow based on the standard deviation of intensity across an emission line

2018 ◽  
Vol 33 (10) ◽  
pp. 1676-1682 ◽  
Author(s):  
Shunchun Yao ◽  
Lifeng Zhang ◽  
Kejing Yin ◽  
Kaijie Bai ◽  
Jialong Xu ◽  
...  
Keyword(s):  
Standard Deviation ◽  
Emission Spectra ◽  
Laser Induced Breakdown Spectroscopy ◽  
Plasma Emission ◽  
Solid Flow ◽  
Laser Induced Plasma ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Line P ◽  
Deviation Method

A scheme named the standard deviation method is presented for identifying the spectral data of a gas–solid flow based on laser-induced breakdown spectroscopy.

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