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  • 31.20 − d  (1)
  • 34.90  (1)
  • 36.40.+d  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Collisional process involving atomic cluster ions (1994)
    Springer
    The European physical journal 31 (1994), S. 187-189 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 36.40.+d
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Collision of Ar cluster ions, Ar n + (n=3−16), with He and Ne atoms was investigated by use of mass spectroscopic techniques. The cross sections for the production of Ar n′ + (n′〈n) were measured as functions of the size of the parent cluster ion and the collision energy (0.1–10 eV in the center-of-mass frame). These results were analyzed in the scheme of hard-sphere spectator collision with RRK theory. It was concluded that the reaction proceeds via collisional excitation of the parent cluster ion and following sequential loss of the constituent Ar atoms.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437834
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Collision-induced reactions of size-selected molecular cluster anions (1993)
    Springer
    The European physical journal 26 (1993), S. 223-225 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 36.40 ; 34.90
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Collision-induced reactions of size-selected cluster anions, (CO2) n − and (N2O)nO− with He and Kr atoms were studied at collision energies from 0.1 to 2.0 eV (center-of mass) by means of a tandem mass-spectrometer equipped with a pair of octapole ion guides. The dominant process was evaporation of the constituent molecules from the parent cluster ion. The absolute cross section for the evaporation was measured as functions of the size of the parent cluster ion and the collision energy. The reaction was explained by collisional excitation of the parent cluster ion followed by its unimolecular dissociation. The observed cross sections which correspond to those for the collisional excitation agree with those calculated in terms of charge-induced dipole and induced dipole-induced dipole interactions between the parent cluster ion and the target atom. The distributions of the product ions resulting from the unimolecular dissociation were reproduced by a simple calculation based on RRK theory. In the collision of (CO2) n − , the cross sections for (CO2) 10 − and (CO2) 14 − were significantly small and their abundances in the product ion distributions were particularly large. These findings indicate that (CO2) 10 − and (CO2) 14 − are stable species. On the other hand, stable species in (N2O)nO− was found to be (N2O)5O−.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01429151
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Frequencies of breathing vibrations of nearly spherical Ar clusters calculated by molecular dynamics (1991)
    Springer
    The European physical journal 20 (1991), S. 161-162 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 31.20 − d ; 36.40. + d
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The breathing vibration of Ar N cluster,N=13, 20, 25, 30 and 55, was investigated by use of the molecular dynamics method. The average distance $$(\bar r)$$ averaged over the positions of all Ar atoms with respect to the center of mass was calculated as a function of time and its frequency spectrum was derived by the Fourier transform analysis. The $$\bar r$$ value was proved to be a good index of the breathing vibration in comparison with the exact breathing vibration of an Ar dense sphere. The vibrational frequency thus estimated,f MD, was found to increase with the cluster sizen as expected.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01543963
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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