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Sensor Electronics and Microsystem Technologies

NEW LASER PHOTOIONIZATION ISOTOPE SEPARATION SCHEME WITH AUTOIONIZATION SORTING OF HIGHLY EXCITED ATOMS FOR HIGHLY RADIOACTIVE ISOTOPES AND PRODUCTS OF ATOMIC ENERGETICS

О. В. Глушков, Георгий Петрович Препелица, О. Ю. Погосов, В. Г. Шевчук, А. А. Свинаренко, Г. В. Ігнатенко, О. В. Бакуніна

Published Apr 6, 2011• 3 citations
Publisher

Abstract

We present new optimal scheme of the separating highly radioactive isotopes and products of atomics energetics such as 133,135,137Cs and others, which is based on the selective laser excitation of the isotopes atoms into excited Rydberg states and further autoionization or DC electric field pulse ionization.
DOI
10.18524/1815-7459.2011.2.117599

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It is proposed and studied a new optimal theoretical scheme for the laser photoionization sensor of the separating isotopes, nuclear isomers and nuclear reactions products, which is based on the selective laser excitation of the isotope atoms into excited Rydberg states and further stochastic collisional ionization mechanism. The operator perturbation theory and FockerPlank stochastic equation method are used for description of stochastic collisional ionization process. The optimal laser action model and density matrices formalism is used for numeric calculation of the optimal scheme of the Na, U, Cs and Cf isotopes (ions, nuclei) sensing.
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Abstract We propose a novel and simple method for the laser isotope separation of 176Lu a precursor for the production of 177Lu medical isotope. The physics of the laser-atom interaction has been studied through the dynamics of the atomic level populations using the density matrix formalism. It has been shown that a combination of cw excitation lasers and pulsed ionization laser can be used for the laser isotope separation of 176Lu. The optimum conditions for the efficient and selective separation of 176Lu have been derived by studying the time evolution of level population under laser excitation. It has also been shown that, it might be possible to produce ~ 100% enriched 176Lu isotope at a rate of 5 mg/h, which is higher than all previously reported methods so far. The isotope separation process proposed can be easily adopted using off-the-shelf lasers, for similar atomic systems.