NDLI: Elemental Analysis of Stones Using Laser-Induced Breakdown Spectroscopy

Content Provider	IEEE Xplore Digital Library
Author	Mahmood, S. Akhtar, M. Jabbar, A. Iqbal, J. Baig, M.A.
Copyright Year	1973
Abstract	We present elemental compositions of different stones found in the locality of the Mirpur region of Azad Jammu and Kashmir using laser-induced breakdown spectroscopy (LIBS). The optical emission spectra of different stones have been recorded using an neodymium-doped yttrium aluminum garnet laser (1064 nm) in conjunction with the LIBS-2000 setup to categorize the existence of various elements and studied the effects of laser irradiance on the intensities, widths, and shifts of the spectral lines. The emission spectra of Gray stones show multiple elements: Ca, Fe, Mg, Sr, Na, and Li, whereas the Half-White stones contain all these elements except Sr. It is observed that the calcium lines dominate at long wavelengths, while iron lines dominate in the shorter wavelength region. We have determined the relative strength of each element and it is found that calcium dominates in both the samples. We have also observed the effects of laser irradiance on the signal intensity and it is noted that the initial signal intensity increases with the increase in the laser irradiance, reach at maximum and then stops increasing further with the increase in energy. The electron number density has been determined from the Stark-broadened profile of the spectral lines.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	2636
Ending Page	2641
Page Count	6
File Size	977828
File Format	PDF
ISSN	00933813
Volume Number	43
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Calcium Iron Plasma temperature Laser transitions Magnesium stones. Laser-induced breakdown spectroscopy (LIBS) relative strength
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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