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  • 36.40. + d  (1)
  • 36.40.01  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Electron bombardment induced fragmentation of size selected neutral (D2O) n clusters (1994)
    Springer
    The European physical journal 31 (1994), S. 291-297 
    Details
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 34.80.Gs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fragmentation behaviour of size selected neutral (D2O) n clusters withn≦4 after ionization with 70 eV electrons is subject of this work. Size selection by scattering the cluster beam from a He target beam in combination with a quadrupole mass filter and time resolved measurements at specific laboratory angles enables us to determine the neutral precursor masses of the detected ions. The measured fragment pattern is dominated by deuterated ions of the form (D2O) n−x D+ withx≧1. The dimer fragmentation which leads with a probability of 62.5% to the D3O+ ion and with 37.5% to D2O+ can be explained by fast intracluster ion-molecule reactions of charged monomer fragments reacting with the partner molecule. For larger clusters the fragmentation process can be rationalised by the creation of an initially highly excited D3O+ (D2O) x complex which is stabilized by evaporating additional monomer units with the main fragment channel (D2O)D+ forn=3 and (D2O)2D+ forn=4. With increasing cluster size an increasing tendency of evaporation of more than one water monomer unit has been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01445010
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The structure of C2H4 clusters from theoretical interaction potentials and vibrational predissociation data (1990)
    Springer
    The European physical journal 15 (1990), S. 341-351 
    Details
    ISSN: 1434-6079
    Keywords: 36.40.01 ; 33.80.Gj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Optimized geometries and binding energies are calculated for ethene (ethylene) dimers, trimers, and tetramers based on a pairwise additive dimer potential. From these results intermolecular frequencies and relative abundancies (catchment areas) of the different isomers are obtained and compared with the results of accurate measurements of the photodissociation upon absorption of one photon of a CO2 laser in the region of thev 7 monomer absorption band at 949 cm−1. The clusters are size selected in a scattering experiment and show for a cluster size fromn=2 ton=6 a frequency maximum shifted by 3 cm−1 to the blue compared with the monomer. The result is explained by the predominance of chains and chain-like structures of the clusters in the photodissociation process. The chains consist of cross-like dimer sub-units.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437178
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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