Temperature determination and the distribution of relative line intensities in combined and arc excitation sources when the solution is introduced in the form of an aerosol

1976 ◽  
Vol 25 (2) ◽  
pp. 939-942
Author(s):  
V. I. Karpukhin ◽  
E. N. Lesnikova ◽  
V. E. Khurin ◽  
A. M. Shavrin
Keyword(s):  
Temperature Determination ◽  
Line Intensities ◽  
Relative Line ◽  
Arc Excitation

Use of Normalized Relative Line Intensities for Qualitative and Semi-Quantitative Analysis in Inductively Coupled Plasma Atomic Emission Spectrometry Using a Custom Segmented-Array Charge-Coupled Device Detector. Part I: Principle and Feasibility

1995 ◽  
Vol 49 (10) ◽  
pp. 1478-1484 ◽  
Author(s):  
Luc Soudier ◽  
Jean-Michel Mermet
Keyword(s):  
Inductively Coupled Plasma ◽  
Major Element ◽  
Atomic Emission ◽  
Atomic Emission Spectrometry ◽  
Emission Spectrometry ◽  
Plasma Atomic Emission Spectrometry ◽  
Charge Coupled Device ◽  
Inductively Coupled ◽  
Line Intensities ◽  
Relative Line

A procedure is described to conduct qualitative analysis in inductively coupled plasma atomic emission spectrometry even in the presence of spectral interferences. This procedure is based on the use of both line correlation and normalized relative line intensities of given elements. When spectral interferences due to a major element are observed for an analyte, use of multiple linear regression of the normalized relative line intensities of both the analyte and the major element provides information about the certainty of the presence of the analyte and the relative concentration between the major element and the analyte. Direct peaking and automatic background correction are required for this procedure. In this instance, no information is necessary about the shape of the line profile. This procedure has been tested with an echelle grating-based dispersive system equipped with a custom segmented-array charge-coupled device detector.

scholarly journals The Problem of Texture in Mössbauer Spectroscopy

Texture ◽  
1974 ◽  
Vol 1 (4) ◽  
pp. 259-263 ◽  
Author(s):  
E. Kreber ◽  
U. Gonser
Keyword(s):  
Mössbauer Spectroscopy ◽  
Single Crystals ◽  
Barium Ferrite ◽  
Mossbauer Spectroscopy ◽  
Polycrystalline Material ◽  
Random Orientation ◽  
Line Intensities ◽  
Mößbauer Spectroscopy ◽  
Texture Information ◽  
Relative Line

In Mössbauer spectroscopy it is desirable to work with single crystals or with polycrystalline material of random orientation. The actual, most occuring, case of preferred orientation (texture) and its influence on the relative line intensities of hyperfine split Mössbauer spectra is analysed. Texture information which can be obtained from such an analysis is demonstrated with variously prepared barium ferrite (Ba Fe12 O19) samples.

scholarly journals Excitation of Spectra of Multiply Ionized Atoms by Capacitor Discharges

1974 ◽  
Vol 28 (3) ◽  
pp. 223-234 ◽  
Author(s):  
Cornelius H. H. Van Deurzen ◽  
John G. Conway
Keyword(s):  
Differential Equation ◽  
Electrical Circuit ◽  
Spectral Lines ◽  
Circuit Parameter ◽  
Excitation Energies ◽  
Time Resolved ◽  
Transfer Rates ◽  
Line Intensities ◽  
Relative Line ◽  
Varied Intensity

Spectra of vanadium have been produced in a vacuum sliding spark, and their relative line intensities have been measured as parameters of the electrical circuit were varied. Intensity maxima of the spectral lines are interpreted as representing excitation energies and have been found to depend in a definitive manner on the power delivered to the source and on the duration of the discharge. The differential equation of the circuit is solved for the charge and energy transfer rates from the capacitor to the source, and two functions of the continuous circuit parameter [Formula: see text] are defined which greatly assist in interpreting the effect of the circuit parameters on the excitation in the source. A relationship was found between the excitation in the source and the electrical circuit parameters. By means of this relationship one may obtain a good estimate of the excitation gained in the spark source. It is shown that by exercising careful control over the circuit parameters it is possible to separate spectra of neighboring ionization stages through either total pulse or time-resolved observations.

Relative line intensities in the lyman bands of HD

1969 ◽  
Vol 4 (5) ◽  
pp. 283-287 ◽  
Author(s):  
Ewald H. Fink ◽  
Daniel L. Akins ◽  
C. Bradley Moore
Keyword(s):  
Line Intensities ◽  
Relative Line

scholarly journals Зависимость характеристик узких линий люминесценции в наноалмазах от параметров возбуждения и температуры

2021 ◽  
Vol 63 (8) ◽  
pp. 1126
Author(s):  
С.А. Грудинкин ◽  
А.Н. Смирнов ◽  
В.Ю. Давыдов ◽  
В.Г. Голубев
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Spectral Characteristics ◽  
Chemical Vapor ◽  
Temperature Quenching ◽  
Excitation Radiation ◽  
Line Intensities ◽  
Relative Line ◽  
Increasing Temperature ◽  
Excitation Parameters

The influence of the excitation parameters and temperature on the spectral characteristics of narrow photoluminescence lines in nanodiamonds obtained by chemical vapor deposition is investigated. It is shown that the ratio of the line intensities in the spectrum depends on the wavelength and power of the excitation radiation. For some lines, with increasing power, a shift in the position of their maximum and broadening is also observed. After irradiation of nanodiamonds with a laser beam with a power density of ~1.2·105 W/cm2, the relative line intensities change. With increasing temperature in the range 79 - 300 K, temperature quenching of their intensity is observed.

The millimetre wave spectrum of the 13C14N radical in its ground state

1984 ◽  
Vol 62 (12) ◽  
pp. 1248-1253 ◽  
Author(s):  
M. Bogey ◽  
C. Demuynck ◽  
J. L. Destombes
Keyword(s):  
Fine Structure ◽  
Glow Discharge ◽  
Ground State ◽  
Wave Spectrum ◽  
Liquid Nitrogen Temperature ◽  
Millimetre Wave ◽  
Line Intensities ◽  
Relative Line ◽  
Rf Glow Discharge ◽  
Structure Constants

The N = 0→ 1 and N = 1 → 2 transitions of 13C14N have been observed in a rf glow discharge in a CO + N2 + He mixture cooled at liquid nitrogen temperature. The 41 measured frequencies have been used to determine the rotational and fine structure constants as well as the hyperfine structure due to the 13C and 14N nuclei. Relative line intensities have also been calculated with a view to interstellar detection.

On Temperature Determination from Rotational Raman Line Intensities

1986 ◽  
Vol 40 (6) ◽  
pp. 831-839 ◽  
Author(s):  
Josef Doppelbauer ◽  
Günter Leyendecker
Keyword(s):  
Single Channel ◽  
Experimental Situation ◽  
Random Errors ◽  
Selected Lines ◽  
Channel Detection ◽  
Temperature Determination ◽  
Temperature Range ◽  
Line Intensities ◽  
Linear Molecules ◽  
Selection Of

A theoretical investigation of temperature determination from the pure rotational Raman spectra of diatomic and linear molecules is performed. Calculations are presented on the suitable selection of the lines used to minimize the random error. The problem is formulated in terms of rotational characteristic temperatures. Our results show, for single-channel detection, that temperature determination from the intensity ratio of only two properly selected lines is superior to the evaluation of many lines. Optimum line pairs are calculated for the most widely used molecules, H2 and N2, in the temperature range 300 to 2000 K. The random errors to be expected in this temperature range are given in a form which allows estimates to be made for any particular experimental situation.

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