[en] Consideration is given to a series of physical problems, which can be solved at cτ-factory-electron-positron collider, overlapping the energy range √s=3-5 GeV and with luminosity of the order of 10³³cm^-2s^-1. Potentialities of cτ factory are correlated with the same ones of existing colliders, operating in the same energy region. Main requirements for universal detector, which could enable realize the considered program of investigations are discussed. 32 refs.; 1 fig

[en] Studied is the cadmium complex formation in MI-CdI₂-H₂O (M=Li,Cs) systems by the method of chemical shift measuring (CS) of Ksub(α1)-cadmium line. Solutions were investigated in a wide range of concentrations, given by the r(r=[I]/[Cd]) parameter in the vicinity solubility isoterms of the given salt systems. Three regions may be singled out on the XC(r) dependence curves:0 < r <= 4; 4 < r < 8; r >= 8. In the first region the formation of cadmium aqua complexes takes plase. In the 4 < r < 8 region individuality appears in the behaviour of systems. In the LiI-CdI₂-H₂O system the [CdI₄]^2- complex form becomes dominating already at r approximately 4, and in the CsI-CdI₂-H₂O system it dominates at r >=8. It is supposed that in the system with CsI at 4 < r < 8 more highly coordinated complexes exist, namely [CdI₅]^3- and [CdI₆]^4-

[en] A study was made of chemical displacements (CD) of transitions which may be observed as sources of independent information on the state of electrons in the valence sublevels of an atom. Theoretical displacements were calculated on the BEhSM-4 by a program for x-ray transitions, I. Theoretical displacements of the x-ray lines of the transition elements (e.g. Ru) were examined similarly. Graphical solutions of the equations presented here were verified by experimental data. The general conclusion is that distribution of the contributions to the charge of the atom from electrons of different symmetry is possible mainly for combination of the electrons that are ''nonequivalent'' in their contribution to the CD of x-ray transitions (s and d, p and d, and also, obviously, s and f, p and f). (E.P.)

No abstract available

[en] Energy shifts of X-ray lines (Ksub((α)sub(1)), Ksub((α)sub(2)), Ksub((β)sub(1)), and Ksub((β)'sub(2))((β)'sub(2))) have been measured for the compounds of Nb, Mo, Ru and Zr with respect to pure metals. Experimental data have been compared with theoretical results of calculating atoms and ions of transition metals by the Hartree-Fock method in relativistic and nonrelativistic approximations. Empirical regularities in the behaviour of chemical shifts of K-lines of 4d-elements have been found. The results are compared with data available on shifts of Ksub((α)sub(1,2)) and Ksub((β)sub(1,3)) lines in the compounds of 3d-transition metals. The effect of metal-metal interaction in chemical shifts of K lines has been discussed for some molybdenum clusters

[en] For the first time carried out is the systematic investigation of chemical shifts of X-ray emission Ksub(αsub(1))-line of cadmium atom in aqueous solutions and insolid phases of the six salt systems considered. It is shown that in CdHlg₂-MHlg-H₂O systems in the Cl→Br→I series and at the substitutuion of Li cation for Cs one the strengthening of complexing takes place. Ratios between concentrations of limit forms of [CdHlg₄]^2- and [CdHlg₄(H₂O)₂]^2- shifts in favour of octahedral complexes in opposite directions. Effective charges of cadmium atom are estimated in its complexes and a method for determination of B'errum proceeding from the X-ray spectral data

[en] Chemical shifts of the X-ray Ksub(α₁) line for a number of Ru complexes have been measured. The results obtained have been studied in conjuction with the data on the isomer shifts of NMR of ⁹⁹Ru. A dependence of the Ksub(α₁) line shift for Ru on the valence has been obtained. The maximum total charge is attained in RuO₄ (1.71e). In the complex compounds of Ru(2) and Ru(3) with various ligands one can observe an involved redistribution of the charges between the 5s-4d-states, the total charge in the case of K₂[RuNO(CN)₅] reaching 1.1e. The estimation of the charges thus obtained on the ruthenium and ligands makes it possible to arrange the latters according to their donor-acceptor activity: -0.46 NO₂< CN approximately Cl< CO< Cl approximately Br< NO< NH₃< H₂O = 0.22

[en] The results of X-ray spectral investigation of praseodymium oxides and solid solutions in the PrO_x-YO_1.5 system are given. Chemical shifts (CS) in emission K-lines of praseodymium: K_α1, K_β1, K_β3 are measured. The values of x in the PrO_x formula are determined. The maximum x value (>1.95) is observed in solid solutions containing 40-50 mol.% PrO_x. The calculations revealed that decrease of 4f-state density takes place with growth of the degree of Pr oxidation (growth of x), at the same time density of 5d-states slightly increases. Certain correlation between 4f-, 5d-electron transitions in praseodymium and increase of electric conductivity of solid solutions in the inestigated system is established

[en] The ZEVS program being a part of software for processing of stereograms from spark chambers in a magnetic field is described. The program realizes spartial reconstruction of tracks by two projections, finding parameters of these tracks and corresponding matrix of errors. Some results of the ZEVS program for the BESM-6 computer are presented

[en] Chemical displacements of Lsub(α₁)-Lsub(β₂)-Lsub(β₅)-Lsub(β₁)-and Lsub(γ₁) U-lines for a number of compounds (UO₃; UO₂F₂ etc.) were measured by Cauchois X-ray spectrometer (quartz crystal 1220, d=1,85 A, R-2000mm). The results were interpreted in comparison with the theoretical calculation (by Hartree-Fock method) for U and its ions. In the experimental displacements of U(VI)-Usub(m) deg-U(m) and U deg m-U(m) the effects were found similar to the theoretically predicted in case of the removal of 5f-electron. The possibility of direct participation of 5f-electron in the formation of the chemical bond is discussed