Measurement and microscopic analysis of the 11B(p,p) reaction at Ep=150MeV. I. Inelastic scattering

V. M. Hannen, K. Amos, A. M. van den Berg, R. K. Bieber, P. K. Deb, F. Ellinghaus, D. Frekers, M. Hagemann, M. N. Harakeh, J. Heyse, M. A. de Huu, B. A. M. Krüsemann, S. Rakers, R. Schmidt, S. Y. van der Werf, and H. J. Wörtche
Phys. Rev. C 67, 054320 – Published 30 May 2003
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Abstract

Cross sections and analyzing powers for the 11B(p,p) reaction have been measured using a 150-MeV polarized proton beam from the AGOR cyclotron at KVI. For the stronger inelastic transitions, also spin-flip probabilities have been extracted. To predict cross sections and spin observables a microscopic (coordinate space) model of elastic scattering has been used, whereas for inelastic scattering calculations were performed in the distorted-wave approximation. In the model calculations a medium-modified two-nucleon effective interaction was used and nuclear structure information was obtained from shell-model calculations in a complete (0+2)ħω model space for parity-conserving transitions and a 1ħω shell-model description in the case of parity-changing transitions. With the help of these model calculations, spin-isovector parts of the M1 strengths for the negative-parity states at excitation energies of 2.125 MeV (Jπ=1/2), 4.445 MeV (Jπ=5/2), 5.020 MeV (Jπ=3/2), and 8.920 MeV (Jπ=5/2) have been extracted and compared to known Gamow-Teller strengths for the analog transitions to 11C.

  • Received 27 November 2002

DOI:https://doi.org/10.1103/PhysRevC.67.054320

©2003 American Physical Society

Authors & Affiliations

V. M. Hannen1,*, K. Amos2, A. M. van den Berg1, R. K. Bieber1,†, P. K. Deb2, F. Ellinghaus3,‡, D. Frekers3, M. Hagemann4, M. N. Harakeh1, J. Heyse4,§, M. A. de Huu1, B. A. M. Krüsemann1,∥, S. Rakers3, R. Schmidt3, S. Y. van der Werf1, and H. J. Wörtche1

  • 1Kernfysisch Versneller Instituut, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands
  • 2School of Physics, University of Melbourne, Victoria 3010, Australia
  • 3Institut für Kernphysik, Westfälische Wilhelms Universität, D-48149 Münster, Germany
  • 4Vakgroep Subatomaire en Stralingsfysica, Universiteit Gent, B-9000 Gent, Belgium

  • *Present address: SRON, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands. Electronic address: v.m.hannen@sron.nl
  • Present address: Universität Köln, Köln, Germany.
  • Present address: DESY, Zeuthen, Germany.
  • §Present address: EC, JRC, IRMM, Geel, Belgium.
  • Present address: ASF Thomas Industries GmbH & Co. KG, Wuppertal, Germany.

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Vol. 67, Iss. 5 — May 2003

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