Effects of Breakup Thresholds in the Single-Particle Momentum Distributions of a Few-Body Continuum

  • R. O. Barrachina
Part of the Few-Body Systems book series (FEWBODY, volume 14)


We present an alternative approach for the study of a break-up process at threshold. Specifically, we demonstrate that the single differential cross section of one particle in a few-body system carries basic information about the breakup threshold of the remaining cluster. Thus, it represents an alternative approach for the study of few-body continua at very low energies. We exemplify these ideas by analyzing the particular case of a three-body system. In particular, we show that it is possible to extract electron-atom scattering parameters, such as the s-wave scattering length from ionization measurements.


Helium Atom Breakup Threshold Laboratory Reference Frame Breakup Channel Metastable Helium Atom 
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  1. 1.
    R.O. Barrachina: Nucl. Instr. Meth. B124, 198 (1997)ADSGoogle Scholar
  2. 2.
    J. Gillespie: Final State Interactions, Holden-Day Inc., San Francisco (1964)Google Scholar
  3. 3.
    J.R. Taylor: Scattering Theory: The Quantum Theory on Nonrelativitic Collisions, John Wiley & Sons, New York (1972)Google Scholar
  4. 4.
    E.P. Wigner: Phys. Rev. 73, 1002 (1948)ADSMATHCrossRefGoogle Scholar
  5. 5.
    P. Macri and R.O. Barrachina: Phys. Rev. A65, 062718 (2002)ADSGoogle Scholar
  6. 6.
    P. Macri and R.O. Barrachina: J. Phys. B31, 1303 (1998)ADSGoogle Scholar
  7. 7.
    R.O. Barrachina, J. Fiol, V.D. Rodríguez and P. Macri: In: The Physics of Electronic and Atomic Collisions, Y. Itikawa et al. (eds.), p. 510, American Institute of Physics, New York (2000)Google Scholar
  8. 8.
    A. Báder, L. Sarkadi, L. Víkor, M. Kuzel, P.A. Závodszky, T. Jalowy, K.O. Groeneveld, P.A. Macri and R.O. Barrachina: Phys. Rev. A55, 14 (1997)ADSGoogle Scholar
  9. 9.
    D.H. Lee, D.J. Pegg and D. Hanstorp: Investigation of Shape and Virtual Resonances in Fast Negative Ion-Atom Collisions, (Meeting of the Am. Phys. Soc., Division of Atomic, Molecular and Optical Physics, Storrs, Connecticut, USA, 14–17 June 2000)Google Scholar
  10. 10.
    Y.K. Bae and J.R. Peterson: Phys. Rev. A32, 1917 (1985)ADSGoogle Scholar
  11. 11.
    G. Haeffler, D. Hanstorp, I. Kiyan, A.E. Klinkmüller, U. Ljungblad and D. Pegg: unpublished (2002)Google Scholar

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© Springer-Verlag/Wien 2003

Authors and Affiliations

  • R. O. Barrachina
    • 1
  1. 1.Centro Atómico Bariloche and Instituto BalseiroRío NegroArgentina

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