[en] The method of separating isotopes by selective excitation through radiation is to be improved. The proposal concerns shaping of the reaction vessel nozzles and the collecting devices for the enriched gas. It is to be achieved that detrimental boundary layers will be avoided, thus increasing the degree of enrichment. Flat alternating beams of the mixture of material to be separated (e.g. ²³⁵UF₆/²³⁸UF₆) and of a neutral auxiliary gas (e.g. Ar) are formed. (RB)

[en] Gaseous isotopes such as UF6 are separated by adiabatically expanding a gas stream containing the isotopes to cool to a temperature at which condensation or dimers are formed. One isotope compound is selectively excited by electromagnetic radiation to inhibit condensation or to effect dissociation of dimers containing one isotope compound. The flow of the gas stream is deflected to effect a change of isotope distribution in the gas stream. Separation is accomplished by peeling the enriched portion of the gas stream from the remainder depleted portion of the gas stream

[en] The method of separating isotopes by selective excitation through radiation is to be improved. The proposal concerns shaping of the reaction vessel nozzles and the collecting devices for the enriched gas. It is to be achieved that detrimental boundary layers will be avoided, thus increasing the degree of enrichment. Flat alternating beams of the mixture of material to be separated (e.g. 235UF6/238UF6) and of a neutral auxiliary gas (e.g. Ar) are formed. (orig./PW)

[en] A mixture of gaseous isotopic compounds and additional gas is adiabatically expanded in a nozzle. The molecules of the gas jet formed are excited by isotope-specific laser radiation and the excited and non-excited molecules are separated into at least two portions. The expansion ratio and initial temperature are chosen so that the additional gas is condensed. The non-excited isotopic compounds accumulate on the condensed gas and are separated from the excited isotopic compounds because of mass differences between the condensed and uncondensed compounds. One or more diffuser chambers are arranged radially about a slot-shaped nozzle. Each chamber has a wall for deflecting gas flow from the nozzle and a partition for separating the gas flow into two portions. The chambers are in communication with an axially arranged collection chamber and a radially arranged collection chamber. Laser radiation enters the housing through axially arranged Brewster windows. It is then reflected by mirrors. There is also a duct for discharging the separated gas mixtures, and suction means for removing a gas boundary layer from the slit-shaped nozzle

[en] The process introduced here particularly concerns the separation of an isotope mixture, e.g. UF₆, by selective excitation of a material by electro-magnetic radiation of a suitable wavelength and energy density in the presence of a partner in the reaction, e.g. HI. An important feature of the new process is the mixing of the substances to be mixed with the partner in the reaction, at such low temperatures (<100 K) that no reaction can occur before the irradiation takes place and the pressing of the resulting mixture into a shaped body, which is then irradicated by a laser. The great density of the material causes high absorption of the light quanta and therefore highly selective probability of excitation. The separation of the enriched components from the irradiated mixture is done by fractional distillation. The devices for carrying out the process are also part of the invention. (RB)

[en] An isotope separation process is claimed. A quantity of a gaseous isotopic substance and at least a stoichiometric quantity of a gaseous reactant are expanded separately from one another adiabatically, to attain temperatures below 100 K. The two substances are then mixed in a condensation chamber. The reactant condenses to form solid particles in which molecules of the isotopic substance are incorporated. The solid particles are collected and subjected to selective excitation employing electromagnetic radiation at a resonant excitation frequency of one isotope component. That component can then undergo a chemical reaction with the reactant. The product of the reaction is then separated

[en] A method of separating two isotope components of a gaseous mixture is described. The mixture is iradiated with coherent polarised electromagnetic radiation. The frequency and electric field strength of the radiation are selected so that the irradiation preferentially excites dipole moment oscillation of molecules of one isotope component. The phasing of the oscillation excited is, at least at the steady-state amplitude of selected oscillation, substantially opposite to that of the electric field of the radiation

[en] It is described a method for separation resp. enrichment of isotopes in a vaporous mixture of compounds or atoms of the isotopes by means of a coherent polarized electromagnetic radiation. The isotope mixture is penetrated by a radiation whose frequency and field intensity are adjusted in such a way that the dipole moment of the groups of molecules to be stimulated is oscillating at least with its final amplitude manily in opposition to, the equivalent group of the other isotope, however, manily in q equal phase with the stimulating field. (HK)

No abstract available

[en] An isotope-selective laser radiation in an adiabatically relaxed flow of gaseous UF₆ with He or Xe as additional gas prevents the excited 235 UF₆ molecules from condensation or from forming dimers. Particles are formed with relatively large mass differences. They are forced on curved diffuser walls into a strong change of direction and are gathered in various regions of the gas flow due to the difference in inertia. They are separated by peelers. (DG)