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AbstractAbstract
[en] The technique of laser-induced breakdown spectroscopy (LIBS) has become an established technique for rapid spot analysis of solid samples. Since laser is used to vaporize the sample, little or no preparation is required and trace elements can be detected in the bulk and as surface contaminants. In this paper, the physicals characteristics and instrumentation which are of importance for quantitative investigations, are described. These include the determination of the concentration of alloy constituents, the detection of surface contaminants and the use of measured line intensities to calculate electron temperatures in laser produced plasmas. Representative examples for a number of targets are given
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Butcher, L.S.
Oxford Univ. (United Kingdom)1997
Oxford Univ. (United Kingdom)1997
AbstractAbstract
No abstract available
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1997; 166 p; Available from British Library Document Supply Centre- DSC:D198114; Thesis (Ph.D.)
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No abstract available
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LAP2012: 6. international conference on laser probing; Paris (France); 4-8 Jun 2012; Copyright (c) 2013 Springer Science+Business Media Dordrecht; Country of input: International Atomic Energy Agency (IAEA)
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Payne, M.G.; Hurst, G.S.
Oak Ridge National Lab., TN (USA)1982
Oak Ridge National Lab., TN (USA)1982
AbstractAbstract
[en] To learn how to take matter apart atom-by-atom and to count each atom according to its type, regardless of its initial chemical or physical state, is presumably a worthy goal in scientific research. The advent of the laser created real hope that these aspirations will be realized. The counting of atoms is not merely an intellectual exercise set apart from real-world applications. On the contrary, even though the capability is scarcely more than five years old, practical applications have been made in many fields of chemistry, physics, the environment, and industry. In this lecture we wish to review how the laser made possible the counting of atoms and how this capability has been put to use in situations where atoms are free to react chemically as they diffuse through a medium. Fluctuation phenomena and statistical mechanics can also be examined in these situations
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1982; 14 p; 9. International School of Quantum Electronics course on analytical laser spectroscopy; Erice (Italy); 23 Sep - 3 Oct 1982; Available from NTIS, PC A02/MF A01 as DE84001942
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AbstractAbstract
[en] Short communication
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Atomic Energy Organization of Iran, Teheran (Iran, Islamic Republic of). Laser Research Center; 137 p; 1993; p. 40; 2. international conference on lasers and their applications; Haye dowvomin konferense beynollmellali lazer va karbord haye an; Teheran (Iran, Islamic Republic of); 23-26 Aug 1993
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AbstractAbstract
[en] Such well-known techniques as radiation echo, the method of quantum beats, and superradiance are widely used in studying relaxation processes both in gases and in condensed media. These techniques are based on coherent processes. The advent of lasers extended extremely the potentialities of these methods in the optical band. Over the last years new spectroscopic methods were developed in optics on the basis of narrow nonlinear optical resonances. The methods proved to be very useful in examining low-pressure gases as they permitted obtaining Doppler free resonances with a homogeneous width. This increased to a great extent a spectroscopic resolution in the optical band and simultaneously permitted studies into relaxation phenomena. A lot of methods to obtain Doppler free narrow resonances have been developed in optics by now. The following methods are widely used in nonlinear laser spectroscopy: 1) Method of saturated absorption. 2) Two-photon resonances. 3) Saturation resonances of stimulated Raman scattering. 4) Method of separated optical fields. (orig./WL)
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Feld, M.S.; Letokhov, V.S. (eds.); Topics in current physics; no. 21; 377 p; ISBN 3-540-10172-1;
; 1980; p. 59-109; Springer; Berlin, Germany, F.R

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Mustapha Imam, Auwal; Safwan Aziz, M.; Chaudhary, Kashif; Rizvi, Zuhaib; Ali, Jalil, E-mail: zuhaib@utm.my2018
AbstractAbstract
[en] The investigations of currency coins dated back to many centuries. Many researchers developed an interest in the investigation of the coin’s weight, size, physical feature and elemental composition. Laser-induced breakdown spectroscopy (LIBS) has the novelty of analytical analyses of various samples. It has the ability for the elemental composition determination of samples of solid (including metals), liquid and/or gases. Malaysia as a country uses Ringgit as a currency, among which are coins of 10, 20 and 50 cents. These coins are in series of release from the Malaysian Central Bank from time to time. There are currently in circulation old and new coins of 5, 10, 20 and 50 cents coins. These coins differ in their physical features and are may be different also in their elemental composition. This paper presents the investigation of the differences in elemental composition between the old and new Malaysian coins of 10, 20 and 50 cents. Principal component analysis (PCA) was used to perform the discrimination between the coins from the LIBS spectra. (paper)
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ILATOS 2017: International Laser Technology and Optics Symposium; Johor Bahru (Malaysia); 26-28 Sep 2017; Available from http://dx.doi.org/10.1088/1742-6596/1027/1/012012; Country of input: International Atomic Energy Agency (IAEA)
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Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 1027(1); [10 p.]

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[en] The thermal response of filters required in laser spectroscopy is discussed. Bandpass and neutral density filters produce transiently oscillating beam intensities when expanded to moderatley intense laser beams. It is stressed that careful placement of filters is needed to avoid these oscillating phenomena and the resulting inaccuracies
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[en] The manner in which laser spectroscopic techniques can be use to probe collisional processes in atomic vapors is reviewed. A discussion of the saturation spectroscopy of three-level systems, coherent transient spectroscopy, and a beam-laser spectroscopy system is presented. It is shown that such experiments can provide useful information on both the total and differential cross sections for atom-atom scattering
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Colloquium on the influence of the collisional processes on the spectral line profiles; Orleans, France; 4 - 5 Sep 1979
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Annales de Physique (Paris); ISSN 0003-4169;
; v. 5(4); p. 199-206

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Vasconcellos, E.C.C.; Zerbetto, S.C.; Zink, L.R.; Evenson, K.M.
Ohio State University 51st international symposium on molecular spectroscopy1996
Ohio State University 51st international symposium on molecular spectroscopy1996
AbstractAbstract
[en] The authors report new far-infrared laser lines generated from two fully deuterated isotopomers of methanol:12CD3OD and 13CD3OD; five from 12CD3OD and 22 from 13CD3OD, which added to the previously reported far-infrared laser lines in these two molecules sums up to 300. The laser lines were mainly pumped by the 10R (regular) and 10SR (sequence) bands of a cw-CO2 laser. The authors measured their frequencies, relative intensities, relative polarizations and pump offsets. The laser lines are in the spectral range from 43.697 to 719.426 μm (6860 664.6 to 416 710.4 MHz)
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Anon; 272 p; 1996; p. 239; Ohio State University; Columbus, OH (United States); 51. Ohio State University international symposium on molecular spectroscopy; Columbus, OH (United States); 10-14 Jun 1996; Ohio State Univ., Dept. of Physics, 174 West 18th Ave., Columbus, OH 43210 (United States)
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