No abstract available

[en] Short note. 2 refs

No abstract available

[en] The age of anatectical granites of Balkashinsk complex was determined by the method of Rb-Sr-dating for studying specific features of granitoid complexes formation in Kokchetav block. Isotopic age of fine- and intermediate-grain granites proved to be 412 ± 6 bill. years, that of acid dikes - 395 ± 8 bill. years, that of leucocraton granites - 382 ± 20 bill. years. The age values presented correspond to granitoids crystallization completion period after action of subsurface high-temperature fluids

[en] Published in summary form only

No abstract available

[en] Short communication

[en] We have demonstrated cold collision experiments for the simultaneously trapped and spatially separated two stable rubidium isotopes. We have moved 8^5Rb cloud by varying the intensity imbalance of the additional laser beams, and measured the collisional loss rate which comes from the collisions with 8^7Rb atoms. The collisional loss effects of two isotopes shows the Gaussian with the separation of two isotopes. The maximum trap loss rate β' is measured to 1.5 x 10^-11cm³/s.

[en] This paper trys to explain the rapid increase in the apparent size of the rubidium isotope nuclei around the magic number N = 50. Droplet and deformation models are used to evaluate the measured data. 6 refs., 4 figs

[en] The method for laser separation of the zinc and rubidium isotopes, based on the selective burning out of excited atoms in flux with the buffer gas and gas-reagent, is experimentally realized. The selective isotope excitation is carried out through the single-photon method with application of weak absorption lines and on the edge of the Doppler contour of absorbing the atoms with low isotope shift value