scholarly journals The Plasma Spectroscopic Study of Dergaon Meteorite, India

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 984
Author(s):  
Abhishek K. Rai ◽  
Jayanta K. Pati ◽  
Christian G. Parigger ◽  
Sonali Dubey ◽  
Awadhesh K. Rai ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
Atomic Emission ◽  
Spectral Signatures ◽  
Planetary Evolution ◽  
Breakdown Spectroscopy ◽  
The Earth ◽  
Laser Induced Breakdown ◽  
First Time ◽  
Dergaon Meteorite

Meteorites are the recoverable portions of asteroids that reach the surface of the Earth. Meteorites are rare extraterrestrial objects studied extensively to improve our understanding of planetary evolution. In this work, we used calibration-free laser-induced breakdown spectroscopy (CF-LIBS) to evaluate the quantitative elemental and molecular analyses of the Dergaon meteorite, a H 4-5 chondrite fall sample from Assam, India. Spectral signatures of H, N, O, Na, Mg, Al, Si, P, K, Ca, Ti, Cr, Mn, Fe, Co, Ni, andIrweredetected. Along with the atomic emission, this work reports the molecular emission from FeO molecules. The concentration of the measured elements obtained using CF-LIBS is in close agreement with earlier reports. The elements H, N, and O and their concentrations are estimated by using CF-LIBS for the first time. This study applies laser spectroscopy to establish the presence of Ni, Cr, Co, and Ir in meteorites. The elemental analysis forms the basis for the establishment of the potential molecular composition of the Dergaon meteorite. Moreover, the elemental analysis approach bodes well for in-situ analyses of extraterrestrial objects including applications in planetary rover missions.

scholarly journals Plasma Spectroscopic Study of Dergaon Meteorite, India

2020 ◽  
Author(s):  
Abhishek K. Rai ◽  
Jayanta K. Pati ◽  
Christian G. Parigger ◽  
Sonali Dubey ◽  
Awadhesh K. Rai ◽  
...  
Keyword(s):  
Elemental Analysis ◽  
Atomic Emission ◽  
Spectral Signatures ◽  
Planetary Evolution ◽  
Breakdown Spectroscopy ◽  
The Earth ◽  
Laser Induced Breakdown ◽  
First Time ◽  
Dergaon Meteorite

Meteorites represent the recoverable portions of asteroids occurring between Mars and Jupiter within the solar system that reach the surface of the Earth. Meteorites are rare extraterrestrial objects studied extensively to improve understanding of planetary evolution. In this work, calibration-free laser-induced breakdown spectroscopy (CF-LIBS) evaluates quantitative elemental and molecular analysis of the Dergaon meteorite, an H 4-5 chondrite fall sample, Assam, India. Spectral signatures of H, N, O, Na, Mg, Al, Si, P, K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Ir, are measured. Along with the atomic emission, this work reports as well molecular emission from FeO molecules. The concentration of the measured elements obtained using CF-LIBS are in close agreement with earlier reports. The elements H, N and O and their concentrations are estimated using CF-LIBS for the first time. This study applies laser spectroscopy to establish presence of Ni, Cr, Co, and Ir in meteorites. Elemental analysis forms the basis for establishment of potential molecular composition of the Dergaon meteorite. Moreover, the elemental analysis approach bodes well for in-situ analyses of extraterrestrial objects including applications in planetary rover missions.

In situ multi-elemental analysis by laser induced breakdown spectroscopy in additive manufacturing

2019 ◽  
Vol 25 ◽  
pp. 64-70 ◽  
Author(s):  
Vasily N. Lednev ◽  
Pavel A. Sdvizhenskii ◽  
Roman D. Asyutin ◽  
Roman S. Tretyakov ◽  
Mikhail Ya. Grishin ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Elemental Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Online laser induced breakdown spectrometry for elemental analysis of compositionally graded alloy parts during its fabricating

2021 ◽  
Author(s):  
Vasily N Lednev ◽  
Pavel A. Sdvizhenskii ◽  
Roman D Asyutin ◽  
Aleksandr V Perestoronin
Keyword(s):  
Additive Manufacturing ◽  
Elemental Analysis ◽  
Laser Induced Breakdown Spectroscopy ◽  
Metal Part ◽  
Breakdown Spectroscopy ◽  
Manufacturing Technique ◽  
Laser Induced Breakdown

In this study we have demonstrated the feasibility of in situ and online laser induced breakdown spectroscopy (LIBS) analysis during compositionally graded metal part synthesis by additive manufacturing technique. Chromium...

Study of Laser-Induced Plasma Emission Spectra of N2, O2, and Ambient Air in the Region 350 nm to 950 nm

1995 ◽  
Vol 49 (10) ◽  
pp. 1490-1499 ◽  
Author(s):  
Robert J. Nordstrom
Keyword(s):  
Spectral Characteristics ◽  
Emission Spectra ◽  
Ambient Air ◽  
Atomic Emission ◽  
Quantitative Information ◽  
Primary Interest ◽  
Emission Data ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a technique where the output from a pulsed laser is focused onto a sample to create an intense plasma. The emission spectrum from the plasma contains quantitative information on the composition of the sample in the region of the breakdown. Growing applications of this technique include remote or in situ measurements where the atmosphere, primarily nitrogen and oxygen, may present spectral interferences. This study was undertaken to evaluate the spectral characteristics of the interference from the nitrogen and oxygen components in air. Of primary interest in this study is the atomic and molecular origin of the emission features. Comparison of the LIBS spectra with NIST atomic emission data is presented.

Mapping of Uranium in Surrogate Nuclear Debris Using Laser-Induced Breakdown Spectroscopy (LIBS)

2019 ◽  
Vol 73 (6) ◽  
pp. 591-600 ◽  
Author(s):  
Michael B. Shattan ◽  
Mark Gragston ◽  
Zhili Zhang ◽  
John D. Auxier ◽  
Kathryn G. McIntosh ◽  
...  
Keyword(s):  
Matrix Effects ◽  
Atomic Emission ◽  
Laser Induced Breakdown Spectroscopy ◽  
Exterior Surface ◽  
Breakdown Spectroscopy ◽  
Melting Temperatures ◽  
Laser Induced Breakdown ◽  
Fractionation Pattern ◽  
Effective Instrument ◽  
First Time

This work describes the use of a laser-induced breakdown spectroscopy (LIBS) system to conduct macroscopic elemental mapping of uranium and iron on the exterior surface and interior center cross-section of surrogate nuclear debris for the first time. The results suggest that similar LIBS systems could be packaged for use as an effective instrument for screening samples during collection activities in the field or to conduct process control measurements during the production of debris surrogates. The technique focuses on the mitigation of chemical and physical matrix effects of four uranium atomic emission lines, relatively free of interferences and of good analytical value. At a spatial resolution of 0.5 mm, a material fractionation pattern in the surrogate debris is identified and discussed in terms of constituent melting temperatures and thermal gradients experienced.

scholarly journals In situ elemental analysis and failures detection during additive manufacturing process utilizing laser induced breakdown spectroscopy

2019 ◽  
Vol 27 (4) ◽  
pp. 4612 ◽  
Author(s):  
Vasily N. Lednev ◽  
Pavel A. Sdvizhenskii ◽  
Roman D. Asyutin ◽  
Roman S. Tretyakov ◽  
Mikhail Ya. Grishin ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Elemental Analysis ◽  
Manufacturing Process ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

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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