Konsantin Lyakhov has completed his PhD from Frankfurt University. He is working as a Research Professor in Nuclear and Energy Engineering Department of Jeju National University. He has published 12 papers in SCOPUS indexed journals.


Laser pulse shape manipulation can serve as an effi cient tool for selective quantum level population control. In this paper it will be demonstrated parametrization of laser pulse shape, parameters variation of which can be implemented by an optical mask applied to the seed pulse. Its further amplifi cation is provided by subsequent cell fi lled by CO2 laser medium, the output laser pulse is subject to use in the method of isotopes separation by selective retardation of condensation in overcooled gas fl ow(SILARC), for selective excitation of all four chlorine isotopologues of 11BCl3 with small time delays, corresponding to respective levels population build up times. It is acheieved by that laser pulse emission spectrum has modes matching absorption lines of diff erent chlorine isotopologues in 11BCl3. In order to provide the largest interaction volume of gas fl ow with laser beam, the latter should intersect it as many times as possible and ambient gas pressure should be maintained on the level, such that gas fl ow remains planar over all its extension from the nozzle outlet to the skimmer inlet. In order to save expensive laser photons, we assume, that refl ectivity of mirror walls is very high and resonator condition inside irradiation cell is fulfi lled. Comparison of our results for enrichment factor and product cut time evolution with one mode continuous excitation indicates that pulsed irradiation with specifi cally designed laser pulse shape allows to increase extractable per cycle isotope quantity signifi cantly at the same energy expenses. Calculations were carried out at the temperature and initial laser intensity, corresponding to the maximum of isotope production over gas fl ow transition time across irradiation cell. Gas fl ow static pressure and BCl3 molar fraction in carrier gas-argon are chosen to fi xed at some small values minimize isotope scrambling.