Advertisement

Excitation of 6 Li above the breakup threshold in the 6 Li + 208 Pb system around the Coulomb barrier

  • M. Mazzocco
  • P. Scopel
  • C. SignoriniEmail author
  • L. Fortunato
  • F. Soramel
  • I. J. Thompson
  • A. Vitturi
  • M. Barbui
  • A. Brondi
  • M. Cinausero
  • D. Fabris
  • E. Fioretto
  • G. La Rana
  • M. Lunardon
  • R. Moro
  • A. Ordine
  • G. F. Prete
  • V. Rizzi
  • L. Stroe
  • M. Trotta
  • E. Vardaci
  • G. Viesti
Short Note

Abstract.

The excitation energy above the breakup threshold of the \(\alpha + d/^6\)Li system, after the interaction of 6Li nuclei with a 208Pb target, was deduced from the invariant mass of the \(\alpha + d\) system. Data were collected with a large-solid-angle detector set-up at four beam energies around the Coulomb barrier. The excitation of the 6Li nucleus above the breakup threshold (1.47 MeV) has a quite similar behavior at each measured beam energy and angle; it is peaked at \(\sim 1\) MeV above the threshold and shows an exponential decay on the high energy side, which is a clear signature of a direct breakup process. The experimental excitation energies are reproduced both in shape and absolute value by 1) fully quantum-mechanical Coupled-Channel calculations with coupling to discretized-continuum 6Li excitations, 2) semi-classical Coupled-Channel approach, where the relative motion is treated along a classical trajectory.

Keywords

Excitation Energy Invariant Mass Beam Energy Coulomb Barrier Classical Trajectory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    A. Yoshida , Phys. Lett. B 389, 457 (1996).CrossRefGoogle Scholar
  2. 2.
    C. Signorini , Eur. Phys. J. A 5, 7 (1999).CrossRefGoogle Scholar
  3. 3.
    M. Dasgupta , Phys. Rev. Lett. 82, 1395 (1999).CrossRefGoogle Scholar
  4. 4.
    D. Hinde , Phys. Rev. Lett. 89, 272701 (2002).CrossRefGoogle Scholar
  5. 5.
    E. Aguilera , Phys. Rev. Lett. 84, 5058 (2000).CrossRefGoogle Scholar
  6. 6.
    M. Dasgupta , Phys. Rev. C 66, 041602(R) (2002).CrossRefGoogle Scholar
  7. 7.
    C. Signorini , Eur. Phys. J. A 10, 249 (2001).CrossRefGoogle Scholar
  8. 8.
    G.R. Kelly , Phys. Rev. C 63, 024601 (2000).CrossRefGoogle Scholar
  9. 9.
    C. Signorini , Phys. Rev. C 67, 044607 (2003).CrossRefGoogle Scholar
  10. 10.
    K. Ieki , Phys. Rev. Lett. 70, 730 (1993).CrossRefGoogle Scholar
  11. 11.
    D. Sakett , Phys. Rev. C 48, 118 (1993).CrossRefGoogle Scholar
  12. 12.
    S. Shimoura , Phys. Lett. B 348, 29 (1995).CrossRefGoogle Scholar
  13. 13.
    T. Nakamura , Phys. Lett. B 331, 296 (1994).CrossRefGoogle Scholar
  14. 14.
    T. Motobayashi , Phys. Rev. Lett. 73, 2680 (1994).CrossRefGoogle Scholar
  15. 15.
    J. Hesselbarth, K.T. Knoepfle, Phys. Rev. Lett. 667, 2773 (1991).CrossRefGoogle Scholar
  16. 16.
    J. Kiener , Phys. Rev. C 44, 2195 (1991).CrossRefGoogle Scholar
  17. 17.
    G. Prete , Nucl. Instrum. Methods Phys. Res. A 422, 263 (1999).CrossRefGoogle Scholar
  18. 18.
    I.J. Thompson, Comput. Phys. Rep. 7, 167 (1988).CrossRefGoogle Scholar
  19. 19.
    C.H. Dasso, S.M. Lenzi, A. Vitturi, Nucl. Phys. A 639, 635 (1998).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • M. Mazzocco
    • 1
  • P. Scopel
    • 1
  • C. Signorini
    • 1
    Email author
  • L. Fortunato
    • 1
  • F. Soramel
    • 2
  • I. J. Thompson
    • 3
  • A. Vitturi
    • 1
  • M. Barbui
    • 4
  • A. Brondi
    • 5
  • M. Cinausero
    • 4
  • D. Fabris
    • 1
  • E. Fioretto
    • 4
  • G. La Rana
    • 5
  • M. Lunardon
    • 1
  • R. Moro
    • 5
  • A. Ordine
    • 5
  • G. F. Prete
    • 4
  • V. Rizzi
    • 1
  • L. Stroe
    • 4
  • M. Trotta
    • 4
  • E. Vardaci
    • 5
  • G. Viesti
    • 1
  1. 1.Physics Department of the University and INFNPaduaItaly
  2. 2.Physics Department of the University and INFN, UdineUdineItaly
  3. 3.University of SurreyGuilfordUK
  4. 4.Laboratori Nazionali di LegnaroINFNLegnaro (Padua)Italy
  5. 5.Physics Department of the University and INFNNaplesItaly

Personalised recommendations