Results 1 - 10 of 15886
Results 1 - 10 of 15886. Search took: 0.038 seconds
|Sort by: date | relevance|
[en] The projected shell model (PSM) study of 100-118Pd nuclei is carried out. The reliability of the ground-state wave functions is checked by reproducing yrast spectra and electromagnetic properties. The results of calculations indicate that the observed deformation systematics in 100-118Pd isotopes depends on the increase of occupation probability of (1h11/2ν) orbit and the deformation producing tendency of n-p interaction operating between Spin Orbit Partner (SOP) orbits (d5/2)π-(d3/2)ν and (g9/2)π-(g7/2)ν. Beside this, the results on band diagrams show that the yrast spectra in Pd isotopes do not arise from a single intrinsic state only but also from multi-quasiparticle states. (orig.)
[en] Full text: The sinthesised by us some complexes of palladium (II) with mercamin (-SCH2 CH2 NH2) were influenced with ammonia in different conditions. Depending of the nature complex and condition of realization of the syhthesis, following complexes: [(Pd2 Cl2(NH3)2 (SCH2CH2NH2)2] (I); [Pd2Br2(NH3)2(SCH2CH2NH2)2] (II) and [Pd2(SCH2CH2NH2)2(NH3)2] Cl2 (III) are received. The results of IRS analysis show, that under the influence of ammonia mercamin can coordinate monodentanto on the sulphur atom (I,II) and bidentanto as a bridge (III). The sulphur atom take place of position in lygand.
[en] Neutron capture cross section measurements on enriched stable Pd isotopes have been performed at the 30 m station of Gelina in the energy range of 10 eV up to 600 keV. The neutron flux shape was determined with a 0.5 mm 6Li-glass scintillator and a 0.6 mm thick 10B4C-slab. The time dependent background was evaluated by using the yields from a 0.5 mm 208Pb capture sample. The present data analysis covers the energy range between 10 keV and 300 keV. (Auth.)
[en] Photoneutron cross sections were measured for 108Pd, 106Pd, and 105Pd with laser-Compton scattering γ-ray beams in an application of the γSF method to a radioactive nucleus 107Pd. We present radiative neutron cross sections for 107Pd[6.5x106 y] obtained with the γSF method.
[en] The use of the mercaptan-functionalized bisphenol A diglycidyl ether epoxy (base material) encapsulated on glass core as matrices for metal catalysts was investigated. Here, the acquiring knowledge of recyclable palladium catalysts for organic reaction which can be mechanically separated from the reaction media and next use as a heterogeneous catalyst in large-scale industries was the most important goal. Homogeneous Pd precursor [PdCl2(PhCN)2] has been heterogenized by attaching to prepared glass-polymeric supports via ligand exchange process. Collected research results indicate that mercaptans used to cure epoxy resin can greatly affect the catalytic properties of the epoxy resin with supported palladium catalyst. The epoxy system modified with mercaptans has a few possible catalytic coordination centers especially oxygen and sulfur to which the palladium ion can be bound. It should be noted that although various concentrations of palladium complex were used, the amount of metal attached to epoxide supports remained the same, that is below the sorption capacity of the polymers. Presented new type of glass-polymer supports comparing to other used corresponding organic carriers offers several practical advantages such as morphological and chemical structure of the matrix, which affect the properties of the heterogenized catalyst in the selected organic reactions: Heck reaction and hydrogenation reaction were investigated. The catalytic activity of all formulated systems was similar to homogeneous palladium precursor PdCl2(PhCN)2. The resulting glass-polymeric matrices and heterogenized palladium catalysts were characterized by varied research techniques such as surface analysis technique (ToF–SIMS) and scanning electron microscopy with energy-dispersive X-ray analyzer (SEM-EDX). We used likewise the atomic absorption spectroscopy (AAS) method to quantify the amount of palladium loaded in the recyclable support and also the BET method to determine specific pore size distribution parameters. Furthermore, XPS spectroscopy showed information about surface structure and chemical states in the palladium-supported catalysts.
[en] Cross sections for (n, p), (n, α) and (n, 2n) reactions have been measured on palladium isotopes at 13.5-14.7 MeV using the activation technique. Data are reported for the following reactions: 102Pd(n, p)102mRh, 102Pd(n, p)102gRh, 105Pd(n, p)105Rh, 106Pd(n, p)106Rh; 106Pd(n, α)103Ru, 108Pd(n, α)105Ru; 102Pd(n, 2n)101Pd and 110Pd(n, 2n)109Pd
[en] Studies of even-even nuclei in the A ∼ 100 transitional mass region within the framework of the interacting boson model-1 (IBM-1) have been expanded down to "9"8Pd nuclei to compare the calculation with new experimental results from measurements obtained at the Institute of Nuclear Physics in Cologne. The low-lying energy levels and the E2 transition rates of "9"8"-"1"0"0Pd nuclei are investigated and their geometric structures are described in the present work. We have also focused on the new B(E2:2_1"+ → 0_1"+) values of "1"1"2","1"1"4Pd nuclei to compare with previously calculated values. It is shown that the new results for the B(E2:2_1"+ → 0_1"+) values of "1"1"2","1"1"4Pd nuclei are more closer to the calculated ones than the earlier experimental data