The basic isotopic exchange reaction is responsible for the separation of15N in the Nitrox system that between gaseous nitrogen oxides and aqueous nitric acid with a single stage separation factor ...Web
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Lithium isotopes are particularly significant among these isotopes for a number of purposes, including military ones. Since these isotopes are light, it is difficult to enrich them. With a focus on electrochemical approaches for stable lithium isotope separation, we have presented some related methods in this article.Web
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Atomic Vapor Laser Isotope Separation (AVLIS) involves the selective excitation and ionization of uranium-235 from atomic uranium vapor using two- or three-color visible or ultraviolet laser irradiation, ... After laser light passes through once, two mirrors at a 90-degree included angle could direct the light back to the laser source at any ...Web
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The premise of Laser Isotope Separation comes from the differing hyperfine structures of isotopes. The different isotopes contain differing number of neutrons which influences the nuclear magnetic dipole …Web
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In any isotope separation process based on the selective excitation of isotopic species by tuned laser light, it is essential that the isotopic shift be as sharply delineated as possible. As used in this application, the term "laser light" includes coherent radiation in the ultraviolet, visible, and infrared portions of the spectrum.Web
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The production of pure deuterium and the removal of tritium from nuclear waste are the key challenges in separation of light isotopes. Presently, the technological methods are extremely energy ...Web
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Isotope separation with a light touch. A new method of separating isotopes using lasers has been unveiled by scientists in the US. In the short term, the technique could be used to purify lithium-7, which is used to cool nuclear reactors. However, in principle, the method should be applicable to isotopes of a wide range of elements.Web
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Isotope Separation (AVLIS), and molecular laser isotope separation (MLIS). Atomic laser isotope separation (LIS) uses finely tuned lasers ... between the light absorption properties of the isotopic species can be greatly magnified, and macroscopic isotope separation can then be achieved (Figure 3-1). Module 3.0: Laser Enrichment Methods (AVLIS ...Web
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The isotope separation process proposed can be easily adopted using off-the-shelf lasers, for similar atomic systems. Introduction Atomic Vapor Laser Isotope …Web
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Recently, low-temperature adsorption-based separation enabled by the differences in isotope adsorption in nanopores due to the higher zero-point energy of …Web
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1. Introduction. Hydrogen isotope species (H 2 /D 2) are needed for multiple applications across science and industry, including proton nuclear magnetic resonance, 1 neutron moderators in nuclear reactors, 2 isotope tracing, 3−5 and neutron scattering techniques. 6 A wide variety of porous materials have been explored for H 2 separation …Web
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established methods of isotope separation are gaseous diffusion and the ultra-centrifuge [1–3]. ... Optical pumping is the process by which light acts on an atom to change it's magnetic state, usually designated by the magnetic quantum number m j, which determines how it will be affected by magnetic fields. The desired isotope will, for ...Web
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Isotope separation with using light induced drift (LID) is discussed. Two basic theoretical characteristics of the method are deduced. I, separation simultaneously with an arbitrary high enrichment and without significant losses; 2, high separation productivity up to 100 μg/h. These characteristics are sufficient and very convenient for the ...Web
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Isotopes are separated by a variety of means, but they are often energy intensive or specific to one element – and usually need to be repeated several times to achieve the required isotopic purity. Now, US researchers claim an alternative solution could be more generally applicable to the light elements. Other researchers are sceptical, however.Web
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The main thrust is aimed at devel- oping workable isotope separation method for nuclear industry: (1) uranium-235, the fissile isotope of uranium needed to fuel light water …Web
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Abstract. In a dilute mixture of optically absorbing atoms or molecules and a buffer gas the phenomenon of Light-Induced Drift (LID) can occur when: (i) the optically absorbing …Web
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The isotope separation for 28 Si was made using the isotope selective decomposition of Si 2 F 6 by infrared pulse laser. The followings are concluded: 1. High enrichment of 28 Si in the residual Si 2 F 6 was observed by the laser irradiation at 952–956 cm − 1.. 2. The concentration of 28 Si increases with lowering the flow rate of Si 2 F 6 and increasing the …Web
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In the present study, the possibility of photochemical separation of the Rb isotopes was demonstrated using the Rb* + CH 3 Cl/CF 3 Cl reactions and the isotope light filtration technique. The ratio between the TOF MS peaks corresponding to the 85 Rb 35 Cl +, 87 Rb 35 Cl + + 85 Rb 37 Cl + and 87 Rb 37 Cl + reaction product ions was …Web
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Atomic Vapor Laser Isotope Separation (AVLIS) of actinides (particularly Uranium) has applications in nuclear industry and defence 1; therefore, a lot of research has been carried out to achieve ...Web
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Processes. Centrifuges. Electromagnetic Separation. Gaseous Diffusion. Thermal Diffusion. Separation Hazards and Wastes. Natural uranium consists of two primary isotopes with mass numbers of 235 and 238. Of the two, only uranium-235 is capable of the sustained fission chain-reaction necessary for an atomic bomb.Web
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Abstract. In this paper, we examine a new method for isotope separation involving the embedding of atoms and molecules into ice. This method is based upon isotope dependent embedding, i.e. capture, in a cryogenic matrix which exhibits excellent single-pass enrichment as demonstrated successfully for selected isotopes of Xe. This …Web
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For large scale separation of light elements, distillation, chemical exchange, or exchange distillation are best, and for large scale separations of heavy isotopes …Web
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The atomic vapor laser isotope separation (AVLIS) method, shown conceptually in Fig. 6, produces uranium vapor, injects laser energy at the precise frequency to ionize only the 235 U atoms, and separates the 235 U ions from the 238 U atoms with an electromagnetic field. Research and development efforts on this method are top priority in the United States …Web
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and much more efficient, called laser isotope separation (LIS). The technique is based on the fact that different isotopes of the same element, while chemically identical, absorb different colors of laser light. Therefore, a laser can be precisely tuned to ionize only atoms of the desired isotope, which are then drawn toWeb
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A new method of separating nuclear isotopes that exploits the slight differences in their electronic energy levels has been developed by physicists in the US. The energy-efficient separator was used to create isotopically pure lithium-7, which is used in …Web
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Therefore, large-scale separation of light isotopes is required to ensure the reliable supply of this key material. In industry, cryogenic distillation, based on the difference in the boiling temperatures of hydrogen isotopes (20.37 K for H 2, 23.71 K for D 2), is still one of the most common separation methods for hydrogen isotopes. However ...Web
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@article{osti_5378667, title = {Tritium isotope separation from light and heavy water by bipolar electrolysis}, author = {Petek, M and Ramey, D W and Taylor, R D and Kobisk, E H}, abstractNote = {A process for separating tritium from light and heavy water is described. Hydrogen is transferred at and through bipolar electrodes at rates H > D > T.Web
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The technology of stable isotopes of light elements and their production have a relatively short time interval - less than 100 years. The very discovery of many stable isotopes dates from 1913 ...Web
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2 1. Introduction Laser isotope separation (LIS) has potentially a much higher enrichment factor than most of the conventional methods. This seems attractive, if one can thus in a single step enrich 235U from natural uranium (235U content 0.72 percent, 235U/238U ratio r0 = 0.0073) to a concentration ≥3 percent (rr ≥ 0.031) that is required for a light-water …Web
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Isotopes separation through quantum sieving effect of membranes is quite promising for industrial applications. For the light hydrogen isotopologues (eg. H2, D2), the confinement of potential ...Web
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Laser shines a new light on isotope separation. 30 Jun 2014. A new method of separating nuclear isotopes that exploits the slight differences in their electronic energy levels has been developed by physicists in the US. The energy-efficient separator was used to create isotopically pure lithium-7, which is used in some nuclear reactors.Web
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The dominant role of physicochemical separation methods in the production of light isotopes is noted. In addition, from the technology development point of view, technical proposals for the improvement of physicochemical separation methods aimed at enriching 15 N and separation of boron isotopes are considered.Web
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earth. Therefore, large-scale separation of light isotopes is required to ensure the reliable supply of this key material. In industry, cryogenic distillation, based on the difference in the boiling temperatures of hydrogen isotopes (20.37 K for H 2, 23.71 K for D 2), is still one of the most common separation methods for hydrogen isotopes.Web
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For large scale separation of light elements, distillation, chemical exchange, or exchange distillation are best, and for large scale separations of heavy isotopes (notably uranium) gaseous diffusion and (more recently) centrifugation have been used, as have processes based on laser technology.Web
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The dominant role of physicochemical separation methods in the production of light isotopes is noted. In addition, from the technology development point of view, …Web
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