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Wednesday, April 22, 2020 | History

2 edition of remote sampling of radioactively and chemically contaminated materials by laser ablation. found in the catalog.

remote sampling of radioactively and chemically contaminated materials by laser ablation.

Stephen Shuttleworth

remote sampling of radioactively and chemically contaminated materials by laser ablation.

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Published by University of Manchester in Manchester .
Written in English


Edition Notes

Thesis (Ph.D.), - University of Manchester, Department of Chemistry.

ContributionsUniversity of Manchester. Department of Chemistry.
The Physical Object
Pagination202p.
Number of Pages202
ID Numbers
Open LibraryOL16576257M

The National Academies Press. NRC. b. Review and Assessment of Developmental Issues Concerning the Metal Parts Treater Design for the Blue Grass Chemical Agent Destruction Pilot Plant. Laser-induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source. The laser is focused to form a plasma, which atomizes and excites samples. The formation of the plasma only begins when the focused laser achieves a certain threshold for optical breakdown, which generally depends on the environment and the. Diagnostic probes for particle and molecule distributions in laser-generated plumes Kimbrell, Sandra Marshall, "Diagnostic probes for particle and molecule distributions in laser-generated plumes " (). vaporization can be easily used to generate gas phase species (16). Laser ablation, >10* W/cm^, can be used for elemental analysis. Author: Sandra Marshall Kimbrell. Spectroscopy / s p ɛ k ˈ t r ɒ s k ə p i / is the study of the interaction between matter and electromagnetic radiation (via electron spectroscopy, atomic spectroscopy, etc). Historically, spectroscopy originated through the study of visible light dispersed according to its wavelength, by a the concept was expanded greatly to include any interaction with radiative energy as a.


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remote sampling of radioactively and chemically contaminated materials by laser ablation. by Stephen Shuttleworth Download PDF EPUB FB2

The need to characterize complex solid samples, including environmental waste, geochemical materials, coatings, and semiconductors, is pushing the development of laser ablation sampling for chemical analysis.

Benefits of laser ablation sampling are well by: A new integrated trace element and multi-isotope provenancing methodology is presented that uses a portable “non-invasive” pulsed laser ablation sampling technique.

Samples are collected on location onto Teflon filters for return to a clean laboratory for low blank (pg) geochemical procedures.

Ablation. A single mode pulsed fiber laser was remote sampling of radioactively and chemically contaminated materials by laser ablation. book to remove fixed contamination from stainless steel substrate by ablation.

Optimisation of the remote sampling of radioactively and chemically contaminated materials by laser ablation. book process was effected with respect to the laser power, repetition rate, laser beam scanning speed and number of by: 1.

Inwe wrote an Analytical Chemistry feature article describing the Physics of Laser Ablation in Microchemical Analysis. In line with the theme of the article, this manuscript discusses current issues in fundamental research, applications based on detecting photons at the ablation site (LIBS and LAMIS) and by collecting particles for excitation in a secondary source (ICP), and.

Find Laser Ablation Sampling - Monitoring and Testing information on the world's largest Environmental portal. In LA-ICP-MS, laser light with visible light wavelength is not short enough to obtain good ablation.

Good laser ablation means less elemental fractionation. The key to less elemental fractionation is sublimation of the entire sample in a short time and formation of small uniform particles, all of which go to ICP-MS. High energy in a small area by a visible to infrared wavelength causes melting only of the small area.

@article{osti_, title = {Demolition and removal of radioactively contaminated concrete soil: Aerosol control and monitoring}, author = {Newton, G. and Hoover, M. and Grace, III, A. C.}, abstractNote = {From totwo concrete-lined ponds were used to reduce the volume of radioactive liquids from the Institute`s research programs.

Radioactively Contaminated Materials An innovative gas-phase decontamination technology has been developed based on gaseous reactions utilizing the volatile property of the carbonyl and fluoric compounds of corrosion products (58 Co, 60 Co, 63 Ni, etc.), fission products (99 Tc, Ru, etc.) and transuranic elements (U, Pu, Np) present on the surface of the material [,].

laser ablation. A fiber optic cable delivers laser light to the surface of interest. This ablates a small quantity of material that is carried away in a stream of argon gas.

The material enters the plasma torch where it is vaporized, atomized, ionized, and electrically excited at about 8, K. This produces. Chemical, biological, radiological, and nuclear (CBRN) decontamination is the removal of CBRN material from equipment or humans.

The objective of the decontamination is to reduce radiation burden, salvage equipment, and materials, remove loose CBRN contaminants, and fix the remaining in place in preparation for protective storage or permanent disposal work activities.

Analytical performance of these sampling strategies was compared by using nm laser ablation ICP-MS. A geological rock (Tuff) was quantitatively analyzed based on NIST series glass standard reference materials.

Laser ablation data were compared to ICP-MS analysis of the dissolved by: Laser ablation in liquids as a new technique of sampling in elemental analysis of solid materials Article in Spectrochimica Acta Part B Atomic Spectroscopy 64(2) February with 98 Reads.

Irradiation of materials such as iron and silicon with single nanosecond laser pulses produces nanostructures on its surfaces. Nevertheless, the deposition before irradiation of thin films on the surface of the silicon wafers can modify the shapes of these structures.

Upon laser irradiation, different effects are produced on the surfaces of monocrystalline silicon wafers coated with a thin Cited by: 1. Laser ablation for surface cleaning has been pursued for the removal of paint on airplanes. It has also been pursued for the cleaning of semiconductor surfaces.

However, all these approaches have been pursued by laser ablation in air. For highly contaminated surface, laser ablation in air can easily cause secondary contamination. Here we test the application of chemical abrasion to Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) by analyzing zircons from both untreated and chemically abraded samples.

Rates of ablation for high alpha-dose non-treated zircons are up to 25% faster than chemically abraded equivalents. Ablation of zircon Cited by: The application of laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) to the elemental analysis of forensic matrices offers many advantages for solid sampling, including.

Laser ablation is becoming a dominant technology for direct solid sampling in analytical chemistry. Laser ablation refers to the process in which an intense burst of energy delivered by a short.

Remote filament induced breakdown spectroscopy has been previously reported for elemental discrimination of composite graphite samples, [10] biological materials [11,12], metals [13] detection and. Ablation using ultra-short sub-1 ps laser pulses has become a popular method for three-dimensional (3D) material structuring: cutting, dicing, hole-drilling, surface- and volume-patterning with nanogratings [1,2,3,4], optical waveguide inscription in glasses and crystals [], non-erasable optical memory and photonic crystals [], creation of new materials and their high pressure and temperature.

Coupled molecular dynamics-Monte Carlo model to study the role of chemical processes during laser ablation of polymeric materials.

The Journal of Chemical Physics, DOI: / Giannis Bounos, Alexandros Selimis, Savas Georgiou, Esther Rebollar, Marta Castillejo, Nikita by: In a study of plant materials, de Carvalho et al. found that after 20 consecutive laser pulses there were notable changes in the crater morphology for targets formed from different particle size fractions of the bulk sample.

For the largest particle size (mean diameter μm) the ablation crater was non-reproducible and by: 2. The aim of the method presented here is to combine melting and contactless ablation of a radioactively contaminated concrete surface by means of a laser beam with waste product conditioning.

Laser Ablation in Analytical Chemistry. Inwe wrote an Analytical Chemistry feature article describing the Physics of Laser Ablation in Microchemical Analysis.

In line with the theme of the article, this manuscript discusses current issues in fundamental research, applications based on detecting photons at the ablation site (LIBS and LAMIS) and by collecting particles for excitation Cited by: Preventive Measures for Radioactive Contamination in Iron and Steel Used as Construction Materials.

Huo-Wang Hsi, Ching-Hwa Wu, Kei-Den Chou, Chin-Shiun Yeh Atomic Energy Council, Taiwan, Republic of Ch LaneKeelung Road, Section 4, Taipei, Taiwan TEL Ext, Fax, E-mail:[email protected] Size: 58KB. Historical pollution can be elucidated with variations of elements’ concentration in tree rings by using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS).

However, the capacity of chemical elements’ absorption significantly depends on the tree species and element types. Metal concentrations in the rings for five species (Platanus occidentalis, Salix koreensis.

basis come into contact with a stray radiation source or radioactively contaminated material during the normal course of business. It is most important for these persons to be able to recognise and.

Incidents of radioactive contamination First incident reported in About 12 incidents, either reported to and during inspection by AERB Main radioisotope of contamination is Co of industrial use, category 3 and below sources Observed radiation levels are to µSv/h, LSA I Metals identified contaminated are rods, flanges, valves, door pullFile Size: 1MB.

@article{osti_, title = {Physico-Chemical Dynamics of Nanoparticle Formation during Laser Decontamination}, author = {Cheng, M D}, abstractNote = {Laser-ablation based decontamination is a new and effective approach for simultaneous removal and characterization of contaminants from surfaces (e.g., building interior and exterior walls, ground floors, etc.).

Applications of Lasers to the Solution of Environmental Problems L. Allen, H-m. Pang, and M. C Abstract: This presentation will focus on current work in the Ames Laboratory where laser ablation is being used for both analytical sampling and metal surface cleaning.

demonstrates that radioactively contaminated aluminum ducts can be Author: L. Allen, H.-M. Pang, M.C. Edelson. Decontamination of contaminated metal and material recycle, two of 31 priority needs identified by the D&D focus group, are the most promising applications for laser ablation within the DOE complex.

F2 Associates has developed a robotic laser ablation system that is capable of high contamination rates, waste volume reduction, surface pore.

@article{osti_, title = {Waste Volume Reduction Using Surface Characterization and Decontamination By Laser Ablation}, author = {Pellin, Michael J and Savina, Michael R and Reed, Claude B and Zhiyue, Xu and Yong, Wang}, abstractNote = {The U.S.

Department of Energy's nuclear complex, a nation-wide system of facilities for research and production of nuclear materials and. Remote laser-induced plasma spectrometry has been demonstrated as a valuable analytical tool both for qualitative inspection and quantitative determinations on environmental samples.

For this objective, the pulsed radiation of a Q-switched Nd:YAG laser at nm has been used to produce a plasma in a remote. Laser-induced breakdown spectroscopy (LIBS) is a type of atomic emission spectroscopy which uses a highly energetic laser pulse as the excitation source.

The laser is focused to form a plasma, which atomizes and excites samples. In principle, LIBS can analyse any matter regardless of its physical state, be it solid, liquid or e all elements emit light of characteristic frequencies. Peer Reviewed: Laser Ablation-ICPMS Elemental fractionation and matrix effects in laser sampling based spectrometry.

Laser ablation particle beam glow discharge time of flight mass spectrometry for the analysis of halogenated polymers and inorganic solid by: The key achievements in the determination of trace amounts of components in environmental samples (soils, ores, natural waters, etc.) by laser-induced breakdown spectrometry are capabilities of this method make it suitable for rapid analysis of metals and alloys, glasses, polymers, objects of cultural heritage, archaeological and various environmental by: Such materials have been formed via the laser ablation of graphite targets in N 2 or NH 3 atmospheres, or by the laser-assisted reactions of precursors in gas and liquid media, giving rise to materials containing up to ≈20 at% nitrogen in the resulting amorphous to nanocrystalline films [54,55,56,57,58,59,60].

There have been reports of Author: Hossein Dizajghorbani-Aghdam, Thomas S. Miller, Rasoul Malekfar, Paul F. McMillan. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

Infrared Laser Ablation Metastable-induced Chemical Ionization: Galhena et al., (Gao et al., ) mass spectrometers could be coupled to the variety of the remote sampling devices and operated at distance for increased flexibility during in situ analysis (Cotte-Rodriguez et al., ).

Assessment of Agent Monitoring Strategies. KEYWORDS: Femtosecond phenomena, Iron, Metals, Copper, Zinc, Laser ablation, Aluminum, Laser damage threshold, Pulsed laser operation, Absorption Read Abstract + Laser ablation of Cu, Al, Fe, Zn, Ni, Pb, and Mo by short pulse laser (nm wavelength, 70fs pulse duration, J/cm2 fluence range) in air was studied.

It looks like laser ablation for nuclear decontamination is being actively researched, but I'm not seeing evidence of it being actively employed at a commercial scale.

This dissertation on the topic (note: despite the introduction in French, the body is in English) highlights three benefits relative to traditional chemical decontamination.

Laser Ablation 43 Double or Multiple Pulse LIBS 47 Summary 49 References 50 water contamination, archaeological studies, artwork dating and cleaning, sampling of biological materials including bacteria and spores, analyses during machining, and homeland security involving analysis of .Radiometric dating, radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.

The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant.Laser-based ambient ionization techniques: (left) Laser Ablation-Electrospray Ionization (LAESI) and (right) Infrared Laser Ablation Metastable-induced Chemical Ionization (IR-LAMICI) Schematic illustrations (this page and facing page) showing the operation of several different ion sources and sampling schemes for ambient masss pectrometry.