[en] A rapid method for the preparation of ⁸⁷Y/^87mSr radionuclide generator from a rubidium chloride target irradiated with 35 MeV α-particles is described. A simple two-step procedure is used to obtain a carrier-free ^87mSr isotope with a high enough radiochemical yield and high purity in the final aqueous fraction. (author)

[en] This report tackles the problems of the ⁸²Sr cyclotron production using a ⁸²Sr-⁸²Rb generator. ⁸²Sr was obtained from a RbCl (99% ⁸⁵Rb) target using the ⁸⁵Rb(p,4n) reaction with 70 MeV protons at the current up to 75μA. Chemical processing included chromatographic isolation of Sr in an ion exchange column. (author). 3 refs.; 1 tab

[en] A criterion for freezing of alkali halides in terms of the principal peak of the liquid charge-charge structure factor Ssub(QQ)(k) has been given in earlier work. Subsequently, a theory of freezing of both neutral binary alloys and alkali halides has been developed, based on partial liquid structure factors as input information. The purpose of the present letter is to report results calculated from this theory, using the neutron determined partial structure factors for RbCl. The important quantity for the present approach is the fractional volume change on melting (Vsub(L) - Vsub(S))/Vsub(S) is identical to eta, L and S referring to liquid and solid respectively

[en] Dielectric loss studies have been made in rubidium chloride crystals doped with Co²⁺ impurities. In this case the impurity ion consists of d-electrons in its outermost shell and is much smaller than the host cation. The peaks in the frequency isotherms follow an Arrhenius type relation. The values of activation energy for the I-V dipole and the pre-exponential factor have been determined and compared with the corresponding values in other related systems. The Co²⁺ impurities are envisaged to have occupied interstitial sites in the lattice and a new vacancy relaxation model is proposed

No abstract available

[en] We study the eigenenergies and eigenfunctions of the ground and the first excited states of an electron, which is strongly coupled to longitudinal-optical phonon in an asymmetric quantum dot with a hydrogen-like impurity by using variational method of Pekar type. A single qubit can be realized in this two-level quantum system. The electron probability density oscillates in the asymmetric quantum dot with a certain period of T₀ = 10.958 fs when the electron is in the superposition state of the ground and the first excited states. Moreover, due to the presence of the different harmonic potentials, the dependence way of the probability density of the electron on the coordinate of z is different from that on the coordinates of x and y. It is found that the oscillating period increases with decreasing Coulombic impurity potential and the polaron radius. (author)

[en] The lineshapes of the absorption bands of F_A centres in alkali halides have been studied for the first time. The new method used for this investigation is based on the determination of the overlap between the F_A1 and F_A2 bands from luminescence measurements. The experimental results have been compared with calculated values deduced from the theoretical F_A bands at different shapes. For both F_A(I) centres in KCl: Na⁺ and F_A(II) centres in KCl: Li⁺ and RbCl: Li⁺ the absorption lineshape at low temperature is much closer to a sum of two Lorentzian curves than that of two Gaussian or Poissonian bands. This result shows an unexpected difference with the F centres, whose absorption lineshape is known to be Poissonian at the same temperatures

[en] By employing the variational method of Pekar type, the effects of electric field on RbCl quantum pseudodot (QPD) qubits were studied. The results confirm that the electron oscillates in the RbCl QPD with a certain period; the electron’s probability density is a raising function of electric field; the oscillating frequency is an increasing one of the electric field and the two-dimensional electron gas chemical potential. Two ways are found for prolonging the lifetime of the qubit and suppressing the decoherence in the quantum information field

[en] Nanosecond electron beam pulses excite in RbCl, RbBr and KBr crystals the continuum of temperature of two-halide auto localized excitons, as well as weak rapid luminescence interference as luminescence of metastable monohalide auto localized excitons luminescence was performed for KBr crystal, excited by 6.6-7.7 and 14-20 eV photons

[en] The new telluric acid adduct (RbCl)₃.Te(OH)₆ was prepared by dissolving RbCl and Te(OH)₆ in the molar ratio of 3: 1 in deionized water at r.t. and slow evaporation of the solvent in air. The crystal structure of the colorless crystals was determined with single-crystal X-ray diffraction (trigonal space group: R anti 3c (no.167), a = 14.4392(8), c = 10.4301(16) A, Z = 6). In (RbCl)₃.Te(OH)₆, the rubidium atom is surrounded by five chlorine and four oxygen atoms in form of an irregular tricapped trigonal prism.E ach tellurium atom is octahedrally surrounded by six oxygen atoms. The Te(OH)₆ octahedra and the RbCl₅O₄ polyhedra are linked to a dense three-dimensional network which is additionally strengthened by hydrogen bonds. (orig.)