Reactions with the double-Borromean nucleus He8

A. Lemasson, A. Navin, N. Keeley, M. Rejmund, S. Bhattacharyya, A. Shrivastava, D. Bazin, D. Beaumel, Y. Blumenfeld, A. Chatterjee, D. Gupta, G. de France, B. Jacquot, M. Labiche, R. Lemmon, V. Nanal, J. Nyberg, R. G. Pillay, R. Raabe, K. Ramachandran, J. A. Scarpaci, C. Simenel, I. Stefan, and C. N. Timis
Phys. Rev. C 82, 044617 – Published 29 October 2010

Abstract

Differential cross sections for elastic-scattering and neutron-transfer reactions along with cross sections for fusion in the He8+Cu65 system are reported at energies above the Coulomb barrier (Elab= 19.9 and 30.6 MeV). The present work demonstrates the feasibility of using inclusive measurements of characteristic in-beam γ rays with low-intensity (~105 pps) radioactive ion beams to obtain the residue cross sections for fusion and neutron transfer. Exclusive measurements of γ rays in coincidence with light charged particles have been used to further characterize the direct reactions induced by this double-Borromean nucleus. Coupled reaction channels calculations are used to illustrate the important role played by the transfer channels and to help in understanding the influence of the structure of He8 on the reaction mechanism.

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  • Received 15 September 2010

DOI:https://doi.org/10.1103/PhysRevC.82.044617

©2010 American Physical Society

Authors & Affiliations

A. Lemasson1, A. Navin1,*, N. Keeley2, M. Rejmund1, S. Bhattacharyya1,3, A. Shrivastava4, D. Bazin5, D. Beaumel6, Y. Blumenfeld6, A. Chatterjee4, D. Gupta6,†, G. de France1, B. Jacquot1, M. Labiche7, R. Lemmon7, V. Nanal8, J. Nyberg9, R. G. Pillay8, R. Raabe1,‡, K. Ramachandran4, J. A. Scarpaci6, C. Simenel10, I. Stefan1,§, and C. N. Timis11

  • 1GANIL, CEA/DSM-CNRS/IN2P3, Bd Henri Becquerel, BP 55027, F-14076 Caen Cedex 5, France
  • 2Department of Nuclear Reactions, The Andrzej Sołtan Institute for Nuclear Studies, ul. Hoża 69, PL-00681 Warsaw, Poland
  • 3Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700064, India
  • 4Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
  • 5National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan, 48824, USA
  • 6Institut de Physique Nucléaire, IN2P3-CNRS, 91406 Orsay, France
  • 7CRLC, Daresbury Laboratory, Daresbury, Warrington WA4 4AD, United Kingdom
  • 8Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, Mumbai 400005, India
  • 9Department of Physics and Astronomy, Uppsala University, Uppsala, Sweden
  • 10IRFU/Service de Physique Nucléaire, CEA Centre de Saclay, F-91191 Gif-sur-Yvette, France
  • 11Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom

  • *navin@ganil.fr
  • Permanent address: Dept. of Physics and Centre for Astroparticle Physics and Space Science, Bose Institute, Kolkata 700091, India.
  • Permanent address: Instituut voor Kern- en Stralingsfysica, K.U. Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium.
  • §Permanent address: Institut de Physique Nucléaire, IN2P3-CNRS, 91406 Orsay, France.

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Vol. 82, Iss. 4 — October 2010

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