Laser Distance Spectrometry LDS

Petah Tikva, Israel

Laser Distance Spectrometry LDS

Petah Tikva, Israel
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Gaft M.,Laser Distance Spectrometry LDS | Nagli L.,Laser Distance Spectrometry LDS | Nagli L.,Tel Aviv University | Panczer G.,CNRS Laboratory of Physical Chemistry of Luminescent Materials | And 2 more authors.
Optical Materials | Year: 2011

Manganese is a very important microelement performing a large number of biological functions in human body. We have detected by spectroscopic measurements manganese in mineral kyanite. In this paper we present laser-induced time-resolved luminescence and optical absorbance spectra of orange, Mn containing kyanite. It was proven the orange color is caused by Mn3+. Several luminescence lines and bands were found and ascribed to Mn4+ and Mn3+, emission centers. The spectroscopic technique can be utilized for detection of small amounts of manganese in minerals. © 2011 Elsevier B.V. All rights reserved.


Gaft M.,Laser Distance Spectrometry LDS | Yeates H.,1707 Vestal Drive | Nagli L.,Laser Distance Spectrometry LDS | Panczer G.,CNRS Laboratory of Physical Chemistry of Luminescent Materials
Journal of Luminescence | Year: 2013

Natural grossular samples from Franklin, NJ Sierra de Cruces Range, Coahuila, Mexico, Asbestos, Canada and Africa (Mali) have been studied by laser-induced time-resolved luminescence techniques. The specific combinations of luminescence and excitation spectra together with luminescence decay times enabled their interpretation as Mn2+, Mn3+, Mn 4+, V2+, Ni2+ and REE3+ emission centers. Such conclusions have been partly supported by luminescence study of artificial garnets activated by the corresponding potential emission centers. © 2013 Published by Elsevier B.V.


Groisman Y.,Laser Distance Spectrometry LDS | Gaft M.,Laser Distance Spectrometry LDS
Spectrochimica Acta - Part B Atomic Spectroscopy | Year: 2010

Presently, online analysis in potassium fertilizers industry is performed by Natural Radioactivity Analyzers. Laser Distance Spectrometry (LDS) has tested, by laboratory scale, the possibility of Laser-Induced Breakdown Spectroscopy (LIBS) technique implementation for online fertilizers production control. The main advantage of the system comparing to the existing technique is the principal possibility to analyze all relevant elements, such as K, Na, Mg, and not only K40 isotope as done in natural radiation analytical systems. Good correlations between online LIBS results with chemical analysis data of K, Na and Mg impurities of samples from Russia, Belarus and Israel demonstrate that LIBS system is a perspective tool for online control of those elements in field conditions. © 2010 Elsevier Ltd. All rights reserved.


Gaft M.,Laser Distance Spectrometry LDS | Nagli L.,Laser Distance Spectrometry LDS | Groisman Y.,Laser Distance Spectrometry LDS
Optical Materials | Year: 2011

Laser-induced breakdown spectroscopy (LIBS) is well known tool for elemental analysis of solid, liquid and gaseous materials. The species emission life times in typical plasma are in 10-50 μs range. It is recognized that after this time following plasma formation any useful information does not exist. It is not the case when matrix subjected for plasma excitation is capable to luminescence. In such case UV, visible photons and possibly X-rays created by plasma excite the matrix luminescence, which may be detected after the corresponding delay when plasma emission becomes comparable by its intensity with luminescence. It may be supposed that plasma created by other means, for example, by spark, will also generate luminescence. Evidently it is new luminescence excitation mechanism and correspondingly new luminescence type, plasma induced luminescence (PIL). © 2011 Elsevier B.V. All rights reserved.

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