ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
    Production of ground state OH following electron impact on H2O (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 5507-5512 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Laser-induced fluorescence (LIF) measurements of OH(X 2Π) production following electron impact on water have been carried out over an energy range from threshold to 300 eV. Data have been made absolute using existing measurements of OH(X) production via dissociative attachment. The cross section reaches a maximum value of 2.1×10−16 cm2 at an energy of 75 eV. Dipole-allowed processes are shown to dominate the production of OH(X) particularly via the A(1B1) repulsive state, though significant population of higher rotational levels is demonstrated, indicating the relevance of other channels as in photodissociation. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1397327
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Detection of neutral metastable fragments from electron-impact on argon clusters (1995)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 102 (1995), S. 8414-8423 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have studied the production of neutral metastable fragments in electron collisions with neutral argon clusters. The fragments are detected using a time-of-flight technique. The time-of-flight spectra show that the metastable fragments appear in two velocity ranges. Kinetic energy distributions are obtained, showing that the faster fragments are ejected with energies from 0.2 to 1.5 eV and that the slower fragments have energies less than 0.2 eV. It is argued that the fragmentation of the clusters involves the excitation and decay of excitons in the clusters.The faster fragments are produced by n=2 excitons, which localize on an excimer or an excited trimer within the cluster and upon dissociation cause the ejection of a metastable atom. The slower fragments are produced by n=1 excitons, which tend to localize on the periphery of the cluster, leading to the ejection of a metastable atom due to weak repulsive forces with neighboring atoms. Four different production mechanisms for neutral metastable fragments are observed. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468832
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Laser induced fluorescence measurements of the X 2Σ+ state of CN produced by electron impact on CH3CN (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 754-760 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Laser induced fluorescence (LIF) measurements of CN production following electron impact on CH3CN are carried out over an energy range from 30 to 300 eV. Cross sections for production of CN (X, v=0) over this range are obtained using the cross section for production of N+2 (X, v=0) as standard. The CN fragments are determined to be rotationally "cold'' suggesting that dissociation occurs by stretching of the C–C bond. Rotational "temperatures'' increased by a factor of 2 (to 80 K) as the incident electron energy was increased from 30 to 300 eV. LIF measurements of the translational energies of the CN fragments revealed a group with a surprisingly low translational temperature of 130 K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.461081
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Wavelengths and Relative A-Coefficients for the Forbidden Lines of Atomic Sulphur (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 538-539 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In an earlier note1 we reported the first laboratory excitation of the forbidden lines of SI and gave the approximate wavelengths. This communication presents the results of relative intensity and accurate wavelength measurements on these lines. The lines were excited in a high voltage a.c. ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/217538a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Absolute Transition Probability of the Auroral Green Line (1968)
    [s.l.] : Nature Publishing Group
    Nature 220 (1968), S. 1017-1018 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The intensity of a spectral line is given by (1) where N defines the population of the upper state and A is the transition probability of the transition. Any experiment to measure A must necessarily involve measurement of I and N simultaneously. The auroral green line was strongly excited by ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2201017a0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Fluorescence following electron impact on argon clusters (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 6521-6525 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A detailed study has been made of electron impact induced fluorescence from Ar clusters. Use of suitable filters in the vacuum ultraviolet spectral region together with time-resolved techniques has enabled the dimer emission from the clusters to be investigated in detail. Excitation function measurements have revealed a number of processes leading to exciton production. Two-center collisions within the cluster appear to be significant. A close parallel to what is observed with solid Ar targets is noted. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.474895
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Selective detection of O(1S0) following electron impact dissociation of O2 and N2O using a XeO* conversion technique (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 4566-4577 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We have observed the metastable species O(1S0) following the dissociation of molecules by pulsed electron impact. A crossed beam apparatus was used to obtain time-of-flight spectra of the fragments. We have employed a novel detector which consists of a layer of freshly deposited Xe. O(1S0) atoms impinging on the surface quickly form XeO* excimers which rapidly decay (〈1 μs) producing easily detected photons. Our present results indicate that this method is sensitive (with high quantum efficiency) solely to the 1S state of oxygen. Other metastables (such as 5S and 1D) and ground state oxygen atoms have not been detected. Low resolution optical spectra of the XeO emission reveal bands at 375, 550, and 725 nm. Time-of-flight and fragment kinetic energy spectra for both target gases at various electron impact energies are presented together with excitation functions from threshold to 1000 eV. These have been made absolute using a Bethe–Born calibration technique for N2O. O2 data are calibrated relative to N2O. Maximum cross sections for O(1S) production are 2.25×10−17 cm2 at 45 eV and 2.1×10−18 cm2 at 80 eV for N2O and O2 targets, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.466056
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Forbidden Lines from Atomic Sulphur (1964)
    [s.l.] : Nature Publishing Group
    Nature 204 (1964), S. 1180-1180 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Conventional high voltage a.c. or d.c. discharges with positive columns were used. The tubes used varied in length from 12 to 200 cm, and in diameter from 1-5 to 3-0 cm. They were filled with xenon to a pressure of a few cm mercury after some sulphur had been distilled in, and were then sealed off ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2041180b0
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Metastable fragment production by electron-impact dissociation of SO2 (1992)
    Springer
    The European physical journal 24 (1992), S. 125-130 
    Details
    ISSN: 1434-6079
    Keywords: 34.80.G
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Time-of-flight detection of neutral metastable fragments has been applied to the study of electron-impact dissociation of SO2 molecules. The time-of-flight distributions indicate that a variety of processes are involved in the production of metastable fragments with a wide range of energies. Rydberg S and O atoms and SO molecules have been identified. Data for these processes have been measured up to 300 eV. The results presented are compared with other studies of fragmentation of SO2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01426696
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    facet.materialart.
    Unknown
    Optical excitation function of H(1s-2p) produced by electron impact from threshold to 1.8 keV (1997)
    American Physical Society
    Details
    Publication Date: 1997-02-01
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Physical Society
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...