α breakup of 6Li and 7Li near the Coulomb barrier

G. R. Kelly, N. J. Davis, R. P. Ward, B. R. Fulton, G. Tungate, N. Keeley, K. Rusek, E. E. Bartosz, P. D. Cathers, D. D. Caussyn, T. L. Drummer, and K. W. Kemper
Phys. Rev. C 63, 024601 – Published 29 December 2000
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Abstract

Angular distributions of the α-particle production differential cross section from the breakup of 6Li and 7Li projectiles incident on a 208Pb target have been measured at seven projectile energies between 29 and 52 MeV. The α-breakup cross section of 6Li was found to be systematically greater than that of 7Li across the entire energy range. These data have been compared with previously reported results and with the predictions of continuum-discretized coupled channels (CDCC) calculations including resonant and nonresonant projectile breakup. The present data compare well with previous measurements, while the CDCC calculations provide a reasonable prediction of the relative α-breakup cross sections but underpredict their absolute values. The calculations confirm that a major factor in the enhancement of the 6Li to 7Li α-breakup cross section is the difference between the α-breakup thresholds of the two isotopes. These results have implications for structural studies of light exotic nuclei based on elastic scattering.

  • Received 23 December 1999

DOI:https://doi.org/10.1103/PhysRevC.63.024601

©2000 American Physical Society

Authors & Affiliations

G. R. Kelly*, N. J. Davis, and R. P. Ward

  • School of Sciences, Staffordshire University, College Road, Stoke-on-Trent ST4 2DE, United Kingdom

B. R. Fulton and G. Tungate

  • School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom

N. Keeley§

  • Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom

K. Rusek

  • Department of Nuclear Reactions, The Andrzej Soltan Institute for Nuclear Studies, Hoża 69, 00681 Warsaw, Poland

E. E. Bartosz, P. D. Cathers, D. D. Caussyn, T. L. Drummer, and K. W. Kemper

  • Department of Physics, Florida State University, Tallahassee, Florida 32306–3016

  • *Present address: Ministry of Defense, London, United Kingdom.
  • Present address: School of Chemistry and Physics, Keele University, Keele, Staffordshire ST5 5BG, United Kingdom.
  • Present address: Department of Physics, University of York, Heslington, York YO10 5DD, United Kingdom.
  • §Present address: Department of Physics, Florida State University, Tallahassee, FL 32306–3016.
  • Present address: Computing and Communications Services Office, University of Illinois as Urbana-Champaign, Urbana, IL 61801.

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Vol. 63, Iss. 2 — February 2001

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