Relevance of the Luminosity-Resolving Power Product for Spectroscopic Imaging

Matveev, O. I.; Smith, B. W.; Omenetto, N.; Winefordner, J. D.

doi:10.1366/0003702991945948

Cited by 8 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A series of old and recent papers describing the parameters relevant to monochromator, collection optics, and detector types follows. 83,,–101 Here, as well as in other sections, whenever it was felt useful, reference to classic papers is provided, in the same spirit that permeated Part I of our review, i.e., that of alerting the reader of the usefulness of reading and learning how the same concepts were previously treated in depth and to take advantage of the already existing knowledge. Concepts such as “Optical Conductance” and “Luminosity-Resolving Power” are introduced and their relevance to LIBS measurements illustrated.…”

Section: Review Outlinementioning

confidence: 99%

“…87 Our choice here is to refer to the book of Alkemade et al, 83 in addition to a selection of papers taken from the literature. The papers selected basically deal with the laws of propagation of radiation, 83,84 imaging spectrometers, 85,86 spectral efficiency, 91 emission volume seen by the detector, 92 echelle monochromators, 88,,–90,93 gated and non-gated detectors, 94,,–99 and the description of a spectrometer allowing full spectral coverage and multichannel operation. 101…”

Section: A Typical Libs Experiment: From Sample To Signalmentioning

confidence: 99%

“…This was also pointed out in a comparison of imaging detectors. 91 It can also be appreciated that the signal-to-noise ratio in an emission experiment does indeed depend on the spectral efficiency of the spectrometer (see Eq. T3.6).…”

Section: A Typical Libs Experiment: From Sample To Signalmentioning

confidence: 99%

See 2 more Smart Citations

Laser-Induced Breakdown Spectroscopy (LIBS), Part II: Review of Instrumental and Methodological Approaches to Material Analysis and Applications to Different Fields

2012

View full text Add to dashboard Cite

The first part of this two-part review focused on the fundamental and diagnostics aspects of laser-induced plasmas, only touching briefly upon concepts such as sensitivity and detection limits and largely omitting any discussion of the vast panorama of the practical applications of the technique. Clearly a true LIBS community has emerged, which promises to quicken the pace of LIBS developments, applications, and implementations. With this second part, a more applied flavor is taken, and its intended goal is summarizing the current state-of-the-art of analytical LIBS, providing a contemporary snapshot of LIBS applications, and highlighting new directions in laser-induced breakdown spectroscopy, such as novel approaches, instrumental developments, and advanced use of chemometric tools. More specifically, we discuss instrumental and analytical approaches (e.g., double- and multi-pulse LIBS to improve the sensitivity), calibration-free approaches, hyphenated approaches in which techniques such as Raman and fluorescence are coupled with LIBS to increase sensitivity and information power, resonantly enhanced LIBS approaches, signal processing and optimization (e.g., signal-to-noise analysis), and finally applications. An attempt is made to provide an updated view of the role played by LIBS in the various fields, with emphasis on applications considered to be unique. We finally try to assess where LIBS is going as an analytical field, where in our opinion it should go, and what should still be done for consolidating the technique as a mature method of chemical analysis.

show abstract

Section: Review Outlinementioning

confidence: 99%

Section: A Typical Libs Experiment: From Sample To Signalmentioning

confidence: 99%

See 1 more Smart Citation

Laser-Induced Breakdown Spectroscopy (LIBS), Part II: Review of Instrumental and Methodological Approaches to Material Analysis and Applications to Different Fields

2012

View full text Add to dashboard Cite

show abstract

“…The main advantage an atomic line filter has over these methods is a superior luminosity resolving power product. 3 Since the resolving power of the filter is based on the absorption profile of an atomic vapor, it rivals most high resolution spectrometers. In addition, the luminosity, defined as the product of the acceptance solid angle (sr) and the projected area (cm 2 ), is limited only to the geometric design of the atomic filter.…”

Section: Introductionmentioning

confidence: 99%

Lifetime Measurements of Several S, P, and D States of Thallium in a Glow Discharge by Single-Step and Two-Step Laser-Excited Fluorescence

et al. 2008

Self Cite

View full text Add to dashboard Cite

The lifetimes of several states in a thallium see-through hollow cathode discharge, or galvatron, are obtained to characterize its potential as an atomic line filter. The lifetimes of the thallium 6(2)D(3/2), 6(2)D(5/2), and 7(2)S(1/2) states are measured by time-resolved single-step laser-excited fluorescence by use of a 276.787 nm laser pulse or a 535.046 nm laser pulse and measuring the resulting fluorescence waveform at the appropriate wavelength. Values of 6.4 +/- 0.1, 7.5 +/- 1.1, and 7.7 +/- 0.2 ns were obtained for the 6(2)D(3/2), 6(2)D(5/2), and 7(2)S(1/2) states, respectively, which agree with values obtained by previous authors, as well as calculated values. No current dependence was observed for each of these states. The lifetime of the long-lived thallium 6(2)P(3/2) degrees metastable state was measured by two-step laser-excited fluorescence at various applied currents. The metastable level was pumped by a 276.787 nm laser pulse, and a temporally delayed 535.046 nm laser pulse interrogated the population of the metastable state. Relating the fluorescence intensity to the population of the metastable state as a function of delay time yielded a decay curve for the 6(2)P(3/2) degrees metastable state. Values of 2.1 +/- 0.2, 2.8 +/- 0.1, 3.1 +/- 0.3, 3.8 +/- 0.4, and 4.8 +/- 0.6 micros were found for applied currents of 14.0, 12.0, 10.0, 8.0, and 6.0 mA, respectively. The resulting lifetimes for the 6(2)P(3/2) degrees metastable state clearly show a dependence on the applied current and are expected to be due to collisions with the wall of the cathode, as well as a contribution due to collisions with electrons.

show abstract

High-resolution Fabry–Pérot interferometric emission measurements of the 535.046 nm thallium line in a see-through hollow cathode discharge

et al. 2007

View full text Add to dashboard Cite

Relevance of the Luminosity-Resolving Power Product for Spectroscopic Imaging

Cited by 8 publications

References 18 publications

Laser-Induced Breakdown Spectroscopy (LIBS), Part II: Review of Instrumental and Methodological Approaches to Material Analysis and Applications to Different Fields

Laser-Induced Breakdown Spectroscopy (LIBS), Part II: Review of Instrumental and Methodological Approaches to Material Analysis and Applications to Different Fields

Lifetime Measurements of Several S, P, and D States of Thallium in a Glow Discharge by Single-Step and Two-Step Laser-Excited Fluorescence

High-resolution Fabry–Pérot interferometric emission measurements of the 535.046 nm thallium line in a see-through hollow cathode discharge

Contact Info

Product

Resources

About