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  • Artikel: DFG Deutsche Nationallizenzen  (5)
  • 1990-1994  (5)
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  • Artikel: DFG Deutsche Nationallizenzen  (5)
Materialart
Erscheinungszeitraum
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Schlagwörter
  • 1
    Digitale Medien
    Digitale Medien
    A spectroscopic study of double electron transfer from Cu to Ar III in an ECR-microwave discharge (1990)
    Springer
    The European physical journal 17 (1990), S. 171-179 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 34.70 ; 52.20.H
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract We present spectroscopic measurements of rate coefficients for the population of the ArI 6d[3/2] o and 8s[3/2] o states by two electron transfer from sputtered Cu to Ar2+ in an ECR microwave discharge. Rate coefficients are obtained from absolutely measured line intensities using a modified corona model. Though the binding energies of these states differ by 8 meV only the probability of populating the 6d level exceeds by a factor of ten that of populating the 8s level. This is attributed to an energy resonance between the two electrons when promoting to their final levels. The cross section for this two electron transfer comes out to be of the order of 10−15 to 10−14 cm2.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437897
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Electron-electron interaction in slow charge exchange collisions (1992)
    Springer
    The European physical journal 23 (1992), S. 61-66 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 34.70
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The influence of excited projectile electrons on the charge exchange mechanism is studied in slow collisions of multiply charged ions with atoms. Translational energy spectra for single electron capture are measured for projectile ions being prepared in the ground state and in an excited metastable state. The differences are discussed in terms of the electron-electron interaction, which turns out to be more important in collision systems with projectiles in low charge states.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01436703
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Dissociation of D2 molecules in collisions with multiply charged ions (1991)
    Springer
    The European physical journal 21 (1991), S. S261 
    Details
    ISSN: 1434-6079
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Dissociative electron capture has been studied in low — energetic collisions of multiply charged ions with simple diatomic molecules (H2, D2;E ∼ (1 *q) keV). The different possible capture reactions are separated with the aid of time-of-flight spectra, which are obtained by the coincident measurement of projectile and recoil ions. In particular, we discuss the relative importance of dissociative single electron capture, its dependence on the projectile scattering angle as well as the type of the involved molecular transition.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01426315
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Excitation of multiply charged ions by electron impact (1991)
    Springer
    The European physical journal 21 (1991), S. S203 
    Details
    ISSN: 1434-6079
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract A new crossed beam apparatus has been developed for measuring differential cross sections for the excitation of multiply charged ions by electron impact. First results have been obtained for sodium-like Argon (Ar7+); the 3s-3p transition with an excitation energy of ∼ 17.5 eV has been studied at an electron energy of 100 eV. The preliminary experimental values are compared with theoretical results obtained within a Born-approximation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01426290
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  • 5
    Digitale Medien
    Digitale Medien
    Electron capture by metastable Ar8+ (2p5 3s) ions in he (1991)
    Springer
    The European physical journal 21 (1991), S. S271 
    Details
    ISSN: 1434-6079
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Single electron capture in low-energetic Ar8+ / He collisions has been studied, using projectiles in the (sp6 1So) ground state as well as in the excited (2p5 3P2.0) metastable states. In both cases capture occurs dominantly into the n=4 levels with slightly different 1 — distributions. In the case of the metastable species the relative fractions of the final states which decay by autoionising or by photon emission are discussed and compared with theoretical predictions.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01426319
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