Measurement of relative line intensities for L-shell X-rays from selected elements between Z = 68 (Er) and Z = 79 (Au)

2016 ◽  
Vol 45 (4) ◽  
pp. 233-243 ◽  
Author(s):  
Brianna Ganly ◽  
Yves Van Haarlem ◽  
James Tickner
Keyword(s):  
X Rays ◽  
Line Intensities ◽  
Relative Line

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.

scholarly journals Low Z Elements of High Grade Metamorphic Rocks by PIXE Analysis – A Comprehensive Review

2020 ◽  
Author(s):  
Avupati Venkata Surya Satyanarayana ◽  
Mokka Jagannadha Rao ◽  
Byreddy Seetharami Reddy
Keyword(s):  
Cross Section ◽  
Analytical Techniques ◽  
Thick Target ◽  
Light Energy ◽  
Low Energy ◽  
High Grade ◽  
X Rays ◽  
Pixe Analysis ◽  
X Ray ◽  
Line Intensities

Abstract. The majority of PIXE analytical study on geosciences has used 3 MeV proton beams for excitation and these studies generally uses the K-X-rays for low Z elements and L-X-rays for high Z elements. The present study of resulting spectra of metamorphic high grade rocks like charnockite can require striping techniques to resolve interference problems between low and high Z elements on the applications of light energy-PIXE using Si (Li) detector. In all forms of X-ray analysis, including thick-target light energy-PIXE, the X-ray signal is a dependent of the ionization cross section and for low-energy protons, the cross section is high for the K shells of light elements and the L shells of heavy elements in charnockite rock providing sufficient fluorescent yield for analytical purposes. For Z > 55, 3 MeV protons cannot ionize K-shell electrons and analysis depends on the use of L-X-ray lines in charnockite rock. Such L-X-ray spectra are complicated and can be affected by interferences K-X-rays from low Z elements. The low Z elements present in the charnockite were identified by previous complementary analytical techniques, but not identified in this study due to the above PIXE experiment limitations, and also particularly due to the dimensions of Si (Li) detector because of low energy K-X-rays of the elements absorbed by the detector window. Both interferences complexity and detector efficiency can lead to difficulties and ambiguity in the interpretation of spectra of low Z charnockite composition, a problem that is exacerbated by uncertainty in relative K-X-ray line intensities of low Z elements. From this investigation, the light energy-PIXE is ideal for the analysis of low Z 

scholarly journals A molecular line survey toward the nearby galaxies NGC 1068, NGC 253, and IC 342 at 3 mm with the Nobeyama 45 m radio telescope: The data

2019 ◽  
Vol 71 (Supplement_1) ◽  
Author(s):  
Shuro Takano ◽  
Taku Nakajima ◽  
Kotaro Kohno
Keyword(s):  
Radio Telescope ◽  
High Spectral Resolution ◽  
X Rays ◽  
Narrow Beam ◽  
Molecular Line ◽  
Line Intensities ◽  
Nearby Galaxies ◽  
Ngc 1068 ◽  
Line Survey ◽  
Molecular Abundances

AbstractWe present observational data of a molecular line survey toward the nearby galaxies NGC 1068, NGC 253, and IC 342 at wavelengths of 3 mm (∼85–116 GHz) obtained with the Nobeyama 45 m radio telescope. Regarding IC 342, a line survey with high spectral resolution in the 3 mm region was reported for the first time. NGC 1068 is a nearby gas-rich galaxy with X-rays from an active galactic nucleus (AGN), and NGC 253 and IC 342 are nearby gas-rich galaxies with prototypical starbursts. These galaxies are useful for studying the impacts of X-rays and ultraviolet radiation on molecular abundances. The survey was carried out with a resulting rms noise level of a few mK ($T\rm {_A^*}$). As a result we could obtain almost complete data of these galaxies in the 3 mm region: we detected 19–23 molecular species, depending on the galaxies, including several new detections (e.g., cyclic-C3H2 in IC 342). We found that the intensities of HCN, CN, and HC3N relative to 13CO are significantly strong in NGC 1068 compared with those in NGC 253 and IC 342. On the other hand, CH3CCH was not detected in NGC 1068. We obtained these results with the narrow beam (${15{^{\prime\prime}_{.}}2}$–${19{^{\prime\prime}_{.}}1}$) of the 45 m telescope, among single-dish telescopes, and in particular selectively observed molecular gas close to the circumnuclear disk (CND) in NGC 1068. The present line intensities in NGC 1068 were compared with those obtained with the IRAM 30 m radio telescope already reported. As a result, the intensity ratio of each line was found to have information on the spatial distribution. Our observations revealed the line intensities and stringent constraints on the upper limit for the three galaxies with such a narrow beam; consequently, the present data will be a basis for further observations with high spatial resolution.

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