Breakup reaction studies of Be10 and B10,11 using a Be10 beam

S. Ahmed, M. Freer, J. C. Angélique, N. I. Ashwood, V. Bouchat, W. N. Catford, N. M. Clarke, N. Curtis, F. Hanappe, J. C. Lecouey, F. M. Marqués, T. Materna, A. Ninane, G. Normand, N. A. Orr, S. Pain, N. Soić, C. Timis, A. Unshakova, and V. A. Ziman
Phys. Rev. C 69, 024303 – Published 12 February 2004

Abstract

The structure of Be10 has been investigated by inelastic scattering to states above the breakup threshold using the reaction C12(Be10,Be*10He6+He4)C12 at Ebeam=302MeV. Excited states in Be10 were observed at 9.6±0.1 and 10.2±0.1MeV. No evidence was observed for the population of the 4+ member of the ground-state band of Be10 indicating the shell-model-like structure of the ground state. In addition, the decay of Be8, B10, and B11, populated in the two-neutron, proton pickup, breakup and 1p pickup reactions, was reconstructed through the detection of coincident He4+He4, He4+Li6, and He4+Li7 particles. Cross sections for the formation of the Be8, Be9, B10, and B11 were also deduced. Contrary to expectations, the two-neutron removal results in the production of Be8 predominantly (80%) in the first excited (2+) state. This suggests that dynamical excitations play an important role in the neutron removal process.

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  • Received 29 August 2003

DOI:https://doi.org/10.1103/PhysRevC.69.024303

©2004 American Physical Society

Authors & Affiliations

S. Ahmed1, M. Freer1, J. C. Angélique3, N. I. Ashwood1, V. Bouchat4, W. N. Catford2,3, N. M. Clarke1, N. Curtis1, F. Hanappe4, J. C. Lecouey3,*, F. M. Marqués3, T. Materna4, A. Ninane7, G. Normand3, N. A. Orr3, S. Pain2, N. Soić1,†, C. Timis3,‡, A. Unshakova5, and V. A. Ziman1

  • 1School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
  • 2School of Electronics and Physical Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
  • 3Laboratoire de Physique Corpusculaire, ISMRA and Universite de Caen, IN2P3-CNRS, 14050 Caen Cedex, France
  • 4Université Libre de Bruxelles, Case Pastale 226, B-1050 Bruxelles, Belgium
  • 5Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
  • 6Institute de Researches Subatomique, IN2P3-CNRS∕Université Louis Pasteur, Boîte Postale 28, 67037 Strasbourg Cedex, France
  • 7Institut de Physique, Université Catholique de Louvain, Louvain-la-Neuve, Belgium

  • *Present address: NSCL, Michigan State University, Michigan 48824, USA.
  • Present address: Rudjer Bošković Institute, Department of Experimental Physics, Bijenička 54, HR-10000 Zagreb, Croatia.
  • Present address: School of Electronics and Physical Sciences, University of Surrey, Guildford, Surrey, GU2 7XH, UK.

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Vol. 69, Iss. 2 — February 2004

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