Scientific Papers

V.Kh.Liechtenstein, I.I.Tankov, On possibility of use of forward electron emission from thin foils to detect energetic neutral particles, JTP Lett., (1977), v.1, No.21, 982-985 (in Russian).

V.Kh. Liechtenstein, A.E. Shabelnikova, N.L. Iasnopolski, Kinetic forward electron emission from conducting and dielectric foil irradiated by hydrogen ions of 0.3-30 keV, Radiotechnika i Electronica,(1978), v. XXIII, No. 6, 1251-1256, (in Russian).

M. Rubel, B. Emmouth, V.Kh. Liechtenstein et al., “Ion beam analysis of thin carbon foils for particle diagnostics in interplanetary space”, Nucl. Instr. and Meth.(1990) B47, 202-204.

M Ivkova, V.Kh. Liechtenstein, E.D. Olshanski, “Preparation and application of ultra thin superstrong diamond-like carbon targets for laboratory and space experiments”, Nucl. Instr. and Meth. (1995) A362, 77-80.

Foreign Collaborators

Prof. Robert Weller, Vanderbilt University, Neshville, TN, USA

Dr. Irving Feigenbaum, Brookhaven National Laboratory, N.Y., USA

№ - 0176 Lasers Techniques for Production of High Pure Elements and Isotopes

Full Title:	Development of the Lasers Techniques for Production of High Pure Elements and Isotopes
Technology Field(s):	FIR-ISO: Fission Reactors / Isotopes PHY-OPL: Physics / Optics and Lasers

Contributors

Vladimir V Osipov	Institute of Electrophysics (Inst of Electrophysics) 34, Komsomol'skaya str., GSP-387, Ekaterinburg, Sverdlovsk reg., 620219, Russia Phone: 7+3432+745174 Fax: 7+3432+745051 plasma@ief.intec.ru
Valeri F Losev	Institute of High Current Electronics (HCEI) 4, Akademicheskiy pr., Tomsk, 634055, Russia Phone: 7+3822+258891 Fax: 7+3822+259410
	Siberian Chemical Complex (SСС) Seversk, Tomsk reg., 636007, Russia Phone: 7+3822+770784 Fax: 7+3822+729612

Present Status of Research

Brief Description of Research

The production of the high pure materials and its isotopes used in microelectronics, atomic energetic, medicine and et. all is of present interest task. The highest demand in national economy have such elements and its radionuclides as Co, Al, Os, Ir, Pt, lanthanides and element of 3, 4, 5 and 6 groups. The production these high pure elements and its isotopes by tradition physical and chemical methods is very expensive and not efficient since they have a close chemical and physical characters. One of the techniques capable to increase the efficiency and to decrease the cost of the production these elements is laser technique. This technique represents the selective influence of the laser radiation on some elements and its following pickup. The precision of the selective influence is very high owing to the laser radiation narrow bandwidth and the possibility to bring its in exact coincidence with the chosen elements resonance line. The resonance lines of some elements belong to ultraviolet and infrared spectrum and well coincide with radiation lines of the high efficient CO₂ and excimer lasers. The object of our Project is the search and development of the efficient laser techniques and gas discharge techniques for production of B, S, Ti, Ir, Pt, Os, and Si isotopes (from BCl₃, SF₆, OsO₄, TiCl₄, SiH₄ and etc.) and high pure elements Co, Tm, Al.

Using of the autoionized resonances in metal vapours, the multiphoton infrared-photodissociation and photopredissociation from intermediate molecules vibration levels with cross-section about 10^-15-10^-16 cm² allow to realise the high efficiency and low cost of the elements cleaning and isotopes separation. According to our estimation the cost of one gram matter using CO₂, Cu, and excimer lasers can be from $50 to $500. It is on one-two order value cheaper then with use a tradition techniques. In the Project is planing the experimental research and simultaneous simulation of the real experiments. At present the unique Cu, CO₂ and excimer lasers (laser systems) have been developed in HCEI (Tomsk) and IEP (Ekaterinburg), namely: XeCl lasers with output energy for pulse 200 J, efficiency up to 4%, radiation linewidth less 0,01 cm^-1, pulse repetition up to 100 Hz, and CO₂ lasers with output energy 3 kJ, efficiency up to 28%, pulse repetition about 1000 Hz, and uninterrupted reconstruction of radiation bandwidth in region 80 cm^-1, Cu laser with pulse repetition 15000 Hz.

We have rich experience of the work with compound halide molecules and high temperature metal vapours. All that has been above said let us hope on successful development of cleaning laser techniques and isotopes separation for chosen elements.

Legal Aspects

More than 20 patents of Russian Federation and author certificates of the USSR on lasers for production chemical elements and isotopes, patent on technique of production of elements and isotopes now under execution.

Special Facilities

Special CO₂, XeCl, Cu, and organic dye - lasers, chamber of extraction. Our Institutes have these lasers.

Scientific Papers

G.A.Mesyats, V.V.Osipov, V.F.Tarasenko. Pulsed Gas Lasers. SPIE Optical Engineering Press, 1995, 374 p.

G.A.Mesyats, Yu.I.Bychkov, B.M.Kovalchuk. High power XeCl eximer lasers, SPIE, vol. 1628, Intense laser beams, pp. 70-80, 1992.