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thermal neutron activation analysis

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Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001748
EISBN: 978-1-62708-178-8
... Abstract Neutron activation analysis (NAA) is a highly sensitive and accurate method of assaying bulk materials for trace levels of many elements. This article provides a detailed account on several types of NAA, namely, nondestructive and radiochemical thermal neutron activation, delayed...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006642
EISBN: 978-1-62708-213-6
... and thus the statistical accuracy in measurements conducted on short-lived activities, such as 207m Pb ( t 1/2 = 0.8 s) and 20 F. One such system is discussed in Ref 12 . Instrumental Neutron Activation Analysis Thermal NAA is the most common NAA technique, primarily because of the relatively...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0005693
EISBN: 978-1-62708-178-8
... SSMS spark source mass spectrometry STEM scanning transmission electron microscopy TEM transmission electron microscopy TNAA thermal neutron activation analysis UV/VIS ultraviolet/visible (absorption spectroscopy) XPS x-ray photoelectron spectroscopy XRPD...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006667
EISBN: 978-1-62708-213-6
... neutron diffraction, powder diffraction, and pair distribution function analysis. The relationship between detector space and reciprocal space are presented. Various factors involved in sample preparation, calibration, and techniques used for analyzing diffraction data are described. The article also...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001765
EISBN: 978-1-62708-178-8
... the article “Crystallographic Texture Measurement and Analysis” in this Volume). The differences lie in the experimental capabilities and are primarily due to the increased penetrability of thermal neutrons in engineering materials ( Ref 4 ). Measurements are usually made with instruments that are designed...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006678
EISBN: 978-1-62708-213-6
... • … … … • • … … … • • • S … … Molecular fluorescence spectroscopy D,N D,N D,N … D,N D,N D,N D,N … … D,N D,N D,N … … Neutron activation analysis N … … N N N N N … … N N N … … Nuclear magnetic resonance N D,N • D,N,S N N N N … … N N S N S Optical metallography...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006432
EISBN: 978-1-62708-192-4
... activity of the sample, the area where radioactive isotopes are present, which isotopes can be produced, and the concentration of isotopes in the base material. Neutron or Bulk Activation Neutron activation uses thermal neutrons originating from a nuclear reactor. Neutrons can easily penetrate most...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006652
EISBN: 978-1-62708-213-6
... chromatography; ICP-MS, inductively coupled plasma mass spectroscopy; LC, liquid chromatography; LC/MS: liquid chromatography/mass spectrometry; LEISS, low-energy ion-scattering spectroscopy; MFS, molecular fluorescence spectroscopy; NAA, neutron activation analysis; NMR, nuclear magnetic resonance; OM, optical...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006748
EISBN: 978-1-62708-213-6
... in the trans- density. analysis based on the detection of character- mission electron microscope equipped to istic radionuclides following nuclear bom- detect and quantify many different signals absorption (of electromagnetic radiation). A bardment. See also neutron activation from the specimen. The technique...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0005692
EISBN: 978-1-62708-178-8
... a sam- bombardment. See also neutron activation analytical electron microscopy (AEM). ple due to regions of different mass den- analysis. The technique of materials analysis in the sity and thickness. transmission electron microscope adsorption chromatography. Chromatog- equipped to detect and quantify...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006671
EISBN: 978-1-62708-213-6
..., electron probe x-ray microanalysis; FTIR, Fourier transform infrared spectroscopy; IA, image analysis; IC, ion chromatography; ICP-AES, inductively coupled plasma atomic emission spectroscopy; IR, infrared spectroscopy; LEISS, low-energy ion-scattering spectroscopy; NAA, neutron activation analysis; OES...
Series: ASM Handbook Archive
Volume: 10
Publisher: ASM International
Published: 01 January 1986
DOI: 10.31399/asm.hb.v10.a0001762
EISBN: 978-1-62708-178-8
... analysis generally involves the collection of data, the calculation of an accurate experimental RDF, and then a comparison of the goodness-of-fit with RDFs computed for proposed models. When sample volumes of the order of cubic centimeters are available, neutron and x-ray diffraction can be used...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003594
EISBN: 978-1-62708-182-5
... for decarburization of an alloy— that is, to increase the partitioning coefficient, C c (s)/ C c (Li)—the chromium activity of the alloy must be increased or a more thermodynamically stable carbide dispersion must be developed (by alloy manipulation or thermal treatment). Experiments in lithium and sodium have...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002493
EISBN: 978-1-62708-194-8
... of computer simulation in the prediction of residual stresses in weldments is the subject of a recent review ( Ref 14 ). Major elements of computer simulation of the process are: Mathematical representation of the heat input from the welding source A transient thermal analysis A transient stress...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006457
EISBN: 978-1-62708-190-0
... Voids and porosity are detectable by low-kilovoltage (15 to 50 kV) x-ray techniques using a beryllium-window x-ray tube, by thermal neutron radiography, and by ultrasonic C-scan techniques employing small-diameter or focused search units operating at 5 to 10 MHz. If the flaw is the result...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
.... Chemical analysis is carried out by X-ray fluorescence spectrometry, atomic absorption spectrophotometry, and plasma-emission spectrophotometry. Phase analysis is done by X-ray diffraction, spectroscopic methods, thermal analysis, and quantitative analysis. Techniques used for microstructural analysis...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006505
EISBN: 978-1-62708-207-5
... developed as a measure of purity ( Ref 9 , 13 ). Improved methods of analysis, including neutron activation, have extended the sensitivity and scope of analyses ( Ref 9 , 14 ). Purity Terminology and Designations The various degrees of purity of aluminum are generally characterized in one of two...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.9781627082136
EISBN: 978-1-62708-213-6
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0005549
EISBN: 978-1-62708-162-7
..., Symbols, and Tradenames DSA dispersion-strengthened alloy Gy gray (unit of absorbed radiation) IR infrared DSC differential scanning calorimeter ISA Instrument Society of America DTA differential thermal analysis h hour ISCC intergranular stress-corrosion e natural log base, 2.71828; charge of an h...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005340
EISBN: 978-1-62708-187-0
...) analyzed include ( Ref 1 ): Emission spectroscopy for Li, B, Na, and heavier elements Hot extraction for hydrogen Combustion analysis for carbon Neutron activation for oxygen Gas chromatography for aluminum carbides and calcium carbides Although the above methods have been used...