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  • 1
    Electronic Resource
    Electronic Resource
    Green Upconversion Emission from Er3+ Ion Doped into Sol-Gel Silica Glasses under Red Light (647.1 nm) Excitation (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 4447-4450 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100013a013
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  • 2
    Electronic Resource
    Electronic Resource
    Dissociative recombination and excitation of N2+: Cross sections and product branching ratios (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 108 (1998), S. 1978-1988 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The absolute dissociative recombination and absolute dissociative excitation rate coefficients and cross sections have been determined for N2+ and electrons for collision energies between 10 meV and 30 eV. The ion storage ring CRYRING has been used in combination with an imaging technique with a position-and-time-sensitive detector. Information is retrieved on the ion beam vibrational state populations and on the product branching in the dissociative recombination process at 0 eV collisions. A hollow cathode ion source has been used to lower the vibrational excitation in the ion beam; a more traditional hot-cathode ion source was used as well. The most important findings are the following. The rate coefficient for an N2+ ion beam (46%, v=0, 27% v=1) versus electron temperature (K) is α(Te)=1.75(±0.09)×10−7(Te/300)−0.30 cm3 s−1. The dissociative recombination rate is found to be weakly dependent on the N2+ vibrational level. At 0 eV collision energy, the v=0 product branching is found to be 0.37(8):0.11(6):0.52(4) for N(4S)+N(2D):N(2P)+N(4S):N(2D)+N(2D) fragments. The dissociative recombination cross section does not have a high-energy peak as was found in a number of lighter molecular systems. The dissociative excitation signal starts only slightly above the energy threshold for dissociation, and peaks near 25 eV. From the dissociative excitation data and literature data, information is retrieved on the dissociative ionization of N2+. The comparison of these results with earlier DR measurements is extensively discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.475577
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  • 3
    Electronic Resource
    Electronic Resource
    Optical Properties of Divalent Thulium in Crystalline Strontium Tetraborate (1995)
    s.l. : American Chemical Society
    Chemistry of materials 7 (1995), S. 1686-1689 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00057a017
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  • 4
    Electronic Resource
    Electronic Resource
    Chloro Complexes of Lead(II) (1965)
    s.l. : American Chemical Society
    Inorganic chemistry 4 (1965), S. 1073-1075 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50029a036
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  • 5
    Electronic Resource
    Electronic Resource
    Rovibrational product distributions of O2+ from the reaction of O+(4S) with CO2 (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 98 (1993), S. 2860-2871 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The nascent rovibrational population of O2+ produced from the reaction of near-thermal O+(4S)+CO2 is measured by observing the translational energy spectrum of its dissociative charge transfer products following neutralization in Cs vapor at keV energies. It is found that of the 1.19 eV exothermicity in the formation reaction, the product O2+ is formed on the average with 0.48 eV of internal energy partitioned nearly equally between vibrational excitation (0.27±0.03 eV) and rotational excitation (0.22±0.03 eV). Populations measured for O2+(v=0−5) are: 0.38, 0.30, 0.18, 0.09, 0.05, 0.01, respectively. The O2+ rotational temperature decreases with increasing vibrational excitation, from Trot=3100 K in v=0 to Trot=450 K in v=5. The present populations show some disagreement with recent flow tube measurements. Details of the technique and a determination of the O2+ rovibrational population following electron-impact ionization of O2 are also presented. The O+(4S)+CO2 reaction and its products are important in the ionospheres of Mars and Venus and in CO2 releases in the Earth's ionosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465072
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  • 6
    Electronic Resource
    Electronic Resource
    The Raman spectra of polycrystalline orthorhombic YF3, SmF3, HoF3, YbF3, and single crystal TbF3 (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 711-715 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Raman spectra of the orthorhombic form of polycrystalline YF3, SmF3, TbF3, HoF3, and YbF3 have been recorded. Room-temperature, polarized Raman spectra of a single crystal of orthorhombic TbF3 have also been obtained. Based on these polarized Raman spectra, symmetry assignments have been made for 23 of the expected 24 Raman active phonon vibrations in TbF3. By analogy to the results from single crystal TbF3, tentative symmetry assignments of the observed phonon vibrations were also made for the other compounds included in this work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455194
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  • 7
    Electronic Resource
    Electronic Resource
    Dissociative decay of NeH and NeD Rydberg states: A strong isotope effect (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 6880-6886 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Radiative and predissociative decay of the n=2 Rydberg states of NeH and NeD is examined using translational spectroscopy to determine the c.m. kinetic energies of the dissociation fragments. The n=2 states are produced from 5 keV NeH+ and NeD+ by electron capture in Cs vapor. Expected radiative dissociation of the B 2Π state is observed in NeH, as is predissociation of the A 2Σ+. However, a surprisingly strong suppression of predissociation occurs in NeD. It is attributed primarily to a reduced overlap of the bound and continuum nuclear wave functions, and results in radiative decay. The results for both species support calculations of Theodorakopoulos et al. [J. Phys. B 20, 5335 (1987)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.457357
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  • 8
    Electronic Resource
    Electronic Resource
    Predissociation of H3 n=2 Rydberg states: Product branching and isotope effects (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 96 (1992), S. 8128-8135 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A translational spectroscopy technique is used to obtain predissociation kinetic energy release spectra from the lowest bound states of H3, 2s 2A'1 and 2p 2A‘2. These H@B|3 states are formed in near-resonant electron capture by 3 keV H+3 in Cs vapor. Their ground rovibrational levels are energetically about 1 eV above the H+H+H dissociation limit, thus all levels can yield both H2+H and the three-body products. The spectra contain both three-body and two-body components and are deconvoluted to obtain the branching ratios. Data obtained from two different ion sources show that the three-body/two-body ratio increases with increased rovibrational energy in the H*3. The results are compared to recent theory and with previously reported ratios from dissociative recombination of H+3. The comparison suggests that the ratio increases monotonically with the total electronic and rovibrational energy in the H@B|3. D*3 predissocation has a similar behavior. The H- and D-atom spectra from the two-body decay of HD@B|2 show that the ejected H atom is strongly favored on a per-atom basis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.462315
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  • 9
    Electronic Resource
    Electronic Resource
    Raman spectra of selected transuranium trihalides in the solid state (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 4666-4670 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Raman spectral data have been obtained from a number of transuranium trihalides in the solid state. The Raman spectra of these actinide compounds are reported and compared to the published Raman spectra of isostructural compounds. Tentative symmetry assignments have been made for the observed Raman-active lattice vibrations based on nuclear site symmetry analysis of their respective crystal structures and comparisons to the symmetry assignments made for isostructural lanthanide compounds. The Raman spectral data obtained in this study represent a partial data base for the use of Raman spectroscopy for identifying the crystal structures exhibited by these and isostructural compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455686
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  • 10
    Electronic Resource
    Electronic Resource
    Photodetachment of WO−3: The electron affinity of WO3 (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 824-827 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Photodetachment cross sections for WO−3 have been measured near the detachment threshold (3.0–3.7 eV). A fast beam of WO−3 is merged with a coaxial cw laser beam and the photodetached electrons are detected with a magnetic confinement slow electron collector. The photodetachment spectrum yields an electron affinity for WO3 of 3.33+0.08−0.15 eV, somewhat lower than values obtained in thermodynamic equilibrium measurements. In addition, a lower limit of 3.7 eV is obtained for the electron affinity of HWO4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461089
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