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wavelength-dispersive spectrometers

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Published: 01 January 1986
Fig. 12 Direct map of the defocusing of a wavelength-dispersive spectrometer during an x-ray area scan across a pure-element standard. The bands represent successive differences of 6% in signal intensity. Source: Ref 21 More
Image
Published: 15 January 2021
Fig. 4 Schematic of a wavelength-dispersive spectrometer system. LiF, lithium fluoride; PET, pentaerythritol More
Image
Published: 15 January 2021
Fig. 5 Wavelength-dispersive spectrometer (WDS) spectrum for analysis of YBa 2 Cu 3 O 7 -Al superconductor. LDE, layered dispersive element; TAP, thallium acid phthalate; LiF, lithium fluoride More
Image
Published: 15 January 2021
Fig. 12 Wavelength-dispersive spectrometer (WDS) analysis results showing diffusion of phosphorus from the outer surface into the substrate material on an alloy steel fastener More
Book Chapter

By S. Lampman
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006645
EISBN: 978-1-62708-213-6
... to those currently used. Soller achieved collimation of x-rays in 1924. Improvements in the gas x-ray detector by Geiger and Mueller in 1928 eventually led to the design of the first commercial wavelength-dispersive x-ray spectrometer by Friedman and Birks in 1948. A simplified schematic of an XRF...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006770
EISBN: 978-1-62708-295-2
... on the operating principles and applications of detectors for x-ray spectroscopy, namely energy-dispersive spectrometers, wavelength-dispersive spectrometers, and handheld x-ray fluorescence systems. The processes involved in x-ray analysis in the SEM and handheld x-ray fluorescence analysis are then covered...
Image
Published: 01 January 1986
Fig. 1 Basic components of the scanning electron microscope. WDS, wavelength-dispersive spectrometer; EDS, energy-dispersive spectrometer; CRT, cathode-ray tube More
Image
Published: 15 December 2019
Fig. 2 Superimposed spectra of BaTiO 3 obtained from energy-dispersive spectrometer (EDS) and wavelength-dispersive spectrometer (WDS) systems, where the WDS spectrum is replotted on the energy scale rather than wavelength. X-ray detection in WDS systems is based on Bragg’s law More
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001768
EISBN: 978-1-62708-178-8
... microanalysis energy-dispersive X-ray spectrometers microbeam analysis qualitative analysis quantitative analysis scanning electron microscopes wavelength-dispersive X-ray fluorescence spectroscopy Overview Introduction Metallurgy has for many years combined chemical analysis on a macroscopic...
Image
Published: 15 December 2019
Fig. 6 Principle of the wavelength dispersive x-ray spectrometer (WDS) with the spectrum of YBa 2 Cu 3 O 7 -Al measured with scans of three diffractors (LDE1, TAP, and LiF) to measure all of the characteristic peaks. LDE, layered dispersive element; lithium fluoride, LiF; PET, pentaerythritol More
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003250
EISBN: 978-1-62708-199-3
... above. Wavelength Dispersive Versus Energy Dispersive Detectors The x-rays emitted from the sample in an XRF spectrometer are detected and analyzed in one of two ways: wavelength dispersive or energy dispersive analysis. In wavelength dispersive instruments, the emitted x-ray beam is directed...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001733
EISBN: 978-1-62708-178-8
... Abstract This article provides an introduction to x-ray spectrometry, and discusses the role of electromagnetic radiation, x-ray emission, and x-ray absorption. It focuses on the instrumentation of wavelength-dispersive x-ray spectrometers, and energy dispersive x-ray spectrometers (EDS...
Image
Published: 01 January 2002
Fig. 5 Schematic diagram of the components of a wavelength-dispersive x-ray spectrometer More
Image
Published: 01 January 1986
Fig. 6 Schematic diagram of the components of a wavelength-dispersive x-ray spectrometer. Courtesy of Cameca Instruments More
Image
Published: 01 January 1986
Fig. 7 Wavelength-dispersive x-ray spectrum of AISI type 347 stainless steel. Philips PW-1410 sequential x-ray spectrometer; molybdenum x-ray tube, 30 kV, 30 mA; P-10 flow proportional detector; LiF(200) analyzing crystal; fine collimation; 100 kcps full scale More
Image
Published: 15 December 2019
Fig. 12 Wavelength-dispersive x-ray spectrum of AISI type 347 stainless steel. Philips PW-1410 sequential x-ray spectrometer; molybdenum x-ray tube, 30 kV, 30 mA; P-10 flow-proportional detector; LiF(200) analyzing crystal; fine collimation; 100 kcps full scale More
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006647
EISBN: 978-1-62708-213-6
... in spectroscopic sources, such as the ICP-OES, correspond to wavelengths in the ultraviolet and visible region of the electromagnetic spectrum. The radiation is collected and dispersed by a spectrometer into characteristic component wavelengths, allowing the element by element analysis of the sample analyte...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003529
EISBN: 978-1-62708-180-1
... a second (less common in commercial laboratories) choice for the x-ray spectrometer: the wavelength-dispersive spectrometer, or WDS. The main difference between the EDS and WDS microprobe techniques is the method of detecting the x-rays. The original design by Castaing utilized a wavelength-dispersive...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001729
EISBN: 978-1-62708-178-8
... wavelength: (Eq 3) Δ E = h c λ The energies of the photons emitted by excited atoms in spectroscopic sources, such as the inductively coupled plasma, correspond to wavelengths in the ultraviolet and visible region of the electromagnetic spectrum. A spectrometer is used to disperse...
Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003755
EISBN: 978-1-62708-177-1
... detector (silicon or germanium solid-state detector). Energy-dispersive x-ray spectroscopy enables the qualitative and quantitative chemical analysis of elements with an atomic number ≥5 (boron). x-ray detection may also be carried out by wavelength-dispersive spectrometers, which consist of a crystal...