Structure of Be12: Intruder d-Wave Strength at N=8

S. D. Pain, W. N. Catford, N. A. Orr, J. C. Angélique, N. I. Ashwood, V. Bouchat, N. M. Clarke, N. Curtis, M. Freer, B. R. Fulton, F. Hanappe, M. Labiche, J. L. Lecouey, R. C. Lemmon, D. Mahboub, A. Ninane, G. Normand, N. Soić, L. Stuttge, C. N. Timis, J. A. Tostevin, J. S. Winfield, and V. Ziman
Phys. Rev. Lett. 96, 032502 – Published 27 January 2006

Abstract

The breaking of the N=8 shell-model magic number in the Be12 ground state has been determined to include significant occupancy of the intruder d-wave orbital. This is in marked contrast with all other N=8 isotones, both more and less exotic than Be12. The occupancies of the 0ω νp1/2 orbital and the 1ω, νd5/2 intruder orbital were deduced from a measurement of neutron removal from a high-energy Be12 beam leading to bound and unbound states in Be11.

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  • Received 26 October 2005

DOI:https://doi.org/10.1103/PhysRevLett.96.032502

©2006 American Physical Society

Authors & Affiliations

S. D. Pain1,*, W. N. Catford1,2, N. A. Orr2, J. C. Angélique2, N. I. Ashwood3, V. Bouchat4, N. M. Clarke3, N. Curtis3, M. Freer3, B. R. Fulton5, F. Hanappe4, M. Labiche6, J. L. Lecouey2, R. C. Lemmon7, D. Mahboub1, A. Ninane8, G. Normand2, N. Soić3,†, L. Stuttge9, C. N. Timis1, J. A. Tostevin1, J. S. Winfield1,2, and V. Ziman3

  • 1Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
  • 2Laboratoire de Physique Corpusculaire, ENSICAEN et Université de Caen, IN2P3-CNRS, 14050 Caen Cedex, France
  • 3School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
  • 4Université Libre de Bruxelles, CP226, B-1050 Bruxelles, Belgium
  • 5Department of Physics, University of York, Heslington, York, YO10 5DD, United Kingdom
  • 6Electronic Engineering and Physics, University of Paisley, High Street, Paisley, Scotland, PA1 2BE, United Kingdom
  • 7CCLRC Daresbury Laboratory, Daresbury, Warrington, Cheshire, WA4 4AD, United Kingdom
  • 8Insitut de Physique Nucléare, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
  • 9Institut de Recherche Subatomique, IN2P3-CNRS/Université de Louis Pasteur, BP28, 67037 Strasbourg Cedex, France

  • *Present address: Rutgers University, c/o Physics Division, Oak Ridge National Laboratory, TN 37831-6354, USA.
  • Present address: Rudjer Bošković Institute, Bijenička 54, HR-10000 Zagreb, Croatia.

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Vol. 96, Iss. 3 — 27 January 2006

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