Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Effect of rescattering on polarization observables of the reaction γd → ppπ in the delta-resonance region (2000)
    Springer
    Physics of atomic nuclei 63 (2000), S. 391-398 
    Details
    ISSN: 1063-7788
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The effect of pion-nucleon and nucleon-nucleon rescatterings on polarization observables of the reaction γd → ppπ− are calculated in the delta-isobar region. Pion-nucleon and nucleon-nucleon rescatterings are considered on the basis of a diagrammatic approach. Lorentz invariant expressions are used for the operators of photoproduction and of pion scattering on a free nucleon. A unitarization procedure in the K-matrix approximation is used for resonance partial-wave amplitudes. It is shown that, in the delta-resonance region, rescattering has a sizable effect on polarization observables of the reaction γd → ppπ− at high momenta of final protons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.855646
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Investigation of the reaction D(e, pp)e′ π − on a tensorpolarized deuterium target at high proton momenta (1998)
    Springer
    JETP letters 67 (1998), S. 770-776 
    Details
    ISSN: 1090-6487
    Keywords: 25.30.Rw ; 27.10.+h
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The differential cross section of the reaction D(e,pp)e′ π − is measured in the range of proton momenta 300–720 MeV/c and proton emergence angles 64–83° for invariant masses of the pp system ranging from 2m p to 2220 MeV/c 2. The measured values of the cross section are found to differ substantially from single-particle model calculations. The components of the analyzing power for this reaction are measured.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1134/1.567746
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Stabilization of silver ions in catalysts based on oxides of rare-earth elements (1985)
    Springer
    Russian chemical bulletin 34 (1985), S. 479-484 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. For the first time, a thermally stable state of silver ions in the composition of catalysts based on rare-earth element oxides has been detected, this state being due to stabilization of silver ions in the oxide matrices, partly in the form of a solid substitution solution. 2. The catalysts that have been studied, on the one hand, retain the chemisorption centers that are present in the original oxides and are responsible for the formation of oxidation-active peroxide (O2 −2) and Superoxide structures; on the other hand, the modified silver catalysts acquire the capability for dissociative high-temperatureechemisorption of oxygen, which is responsible for redox conversions on the surface. 3. A direct relationship has been established between the change in electronic state of the silver ions in the bulk oxides of rare-earth elements and the redox reactions on the catalyst surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00947704
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Interaction of water vapors with germanium coated with an oxide film (1975)
    Springer
    Russian chemical bulletin 24 (1975), S. 2044-2047 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. The kinetics of the charging of the surface of germanium, covered with a permeable oxide film, in H2O vapors is determined by the kinetics of the chemisorption of H2O. The latter is determined by the diffusion of H2O in the oxide film, complicated by the localization of H2O on centers of chemisorption. 2. The basic change (decrease) in the work function (∼80%) in the adsorption of H2O is due to macroscopic charging of the surface of germanium. 3. The nature of the adsorption of H2O and the sign of the charge of the molecule change if the temperature of preliminary heating under vacuum is 〉200°.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00929720
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    ESR characteristics of paramagnetic species on Pd/La2O3 catalysts (1989)
    Springer
    Reaction kinetics and catalysis letters 40 (1989), S. 201-207 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Восстановление Pd/La2O3 катализаторов водородом и CO приводит к образованию Pd+ в объеме и приповерхностном слое. Восстановление катализатора усиливается благодаря спилловеру водорода. При адсорбции CO и O2 образуются радикалы (CO) 2 − и O 2 − на поверхности La2O3.
    Notes: Abstract Reduction of Pd/La2O3 catalysts by H2 and CO at room temperature leads to the formation of Pd+ ions stabilized in bulk and the subsurface layer. Hydrogen spillover seems to enhance the process. O 2 − and (CO) 2 − radicals are formed after adsorption of CO and O2 at 295 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02073794
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Catalytic and chemisorption activity of rare-earth element oxides modified by copper and silver ions in oxidation processes (1985)
    Springer
    Reaction kinetics and catalysis letters 29 (1985), S. 159-166 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Модифицирование оксидов редкоземельных злементов (о. р. з.) ионами меди и серебра приводит к возникновению парамагнитных ионов двухвалентного серэбра и резкому повыше нию активности каталитических и хемосорбционных центров поверхности о. р. з. в катализе процессов окисления.
    Notes: Abstract It has been established that the modification of rareearth element oxides by copper or silver ions leads to the formation of paramagnetic ions of divalent silver and greatly increases the activity of catalytic and chemisorption centers on their surface in catalytic oxidation processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02067963
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Paramagnetic species on the surface of chemically activated silica (1989)
    Springer
    Reaction kinetics and catalysis letters 39 (1989), S. 387-392 
    Details
    ISSN: 1588-2837
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Методом ЭПР спектроскопии изучены активные центры, образующиеся при разложении метоксилированной поверхности силикагеля. Обнаружено несколько типов координационно-ненасыщенных атомов кремния, отличающихся пространственным расположением, координацией, числом центров и проявляющих сходство в характере взаимодействия с молекулами H2, CO, O2.
    Notes: Abstract Active centers of SiO2 formed during thermolysis of methoxylated silica surface has been studied by ESR. Several types of coordinatively unsaturated silicon atoms, which differ in location and number but show similar reactivity toward various adsorbates, have been found.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02071357
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    XPS study of carbonation of Mn/Y2O3 catalysts (1996)
    Springer
    Reaction kinetics and catalysis letters 57 (1996), S. 93-97 
    Details
    ISSN: 1588-2837
    Keywords: Surface carbonates ; XPS ; manganese catalysts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract XPS spectra in the Ols range of binding energy demonstrate a steady decline of concentration of surface carbonate groups as Mn loading in Mn/Y2O3 oxide catalysts increases from 0 to 50 at.%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02076125
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Transformation of carbon monoxide dimer surface structures on yttrium oxide modified by silver (1987)
    Springer
    Russian chemical bulletin 36 (1987), S. 444-450 
    Details
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Conclusions 1. It has been established that introducing Ions of silver(II) in yttrium (III) oxide leads to the formation of a significant concentration of a paramagnetic dimer species (CO)2 − in the course of the adsorption of carbon monoxide, and that these dimers exhibit high thermal stability and reactivity. 2. Kinetic dependences have been obtained for the transformation of the paramagnetic species O2 −, CO2 −, (CO)2 −, and Ag2+ during the interaction of CO and O2 on the surface of Ag/Y2O3 that suggest that these species participate in the low-temperature oxidation of carbon monoxide. 3. Reactions are proposed for the formation of the dimer species (CO)2 2− and (CO)2 − on the surface of the Ag/Y2O3 catalyst that involve the reduction of the anion vacancies and a change in the oxidation state of the silver ions. 4. Modifying the yttrium oxide with ionic silver leads to a marked decrease in the strength of the oxidative ability of the surface of the catalyst for CO, while the nature of the active sites of the yttrium oxide, which adsorbs CO in three forms, remains unchanged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955812
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...