Electron scattering from Be9

J. P. Glickman, W. Bertozzi, T. N. Buti, S. Dixit, F. W. Hersman, C. E. Hyde-Wright, M. V. Hynes, R. W. Lourie, B. E. Norum, J. J. Kelly, B. L. Berman, and D. J. Millener
Phys. Rev. C 43, 1740 – Published 1 April 1991
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Abstract

The structure of Be9 is investigated using electron scattering measurements at 90° and 160° for momentum transfers between about 1.0 and 2.5 fm1. In addition to the 3/2 ground state and the narrow 5/2 state at 2.43 MeV, detailed line-shape analysis was used to extract cross sections for broad states at 1.68, 3.05, 4.70, 6.38, 6.76, 11.28, and 13.79 MeV. The previously unknown state at 6.38 MeV was isolated from the known 6.76 MeV state in both (e,e) and (p,p) data using the dependence of peak position upon momentum transfer. On the basis of the form factor, the 6.38 MeV state replaces the 6.76 MeV state as the 7/2 member of the ground-state rotational band and the 6.76 MeV state is identified with the lowest 9/2+ state predicted by the shell model. The data for all states are compared with a shell-model calculation that uses the full 0ħω and 1ħω model spaces. Calculations are also presented for the narrow states between 14 and 18 MeV excitation.

  • Received 1 October 1990

DOI:https://doi.org/10.1103/PhysRevC.43.1740

©1991 American Physical Society

Authors & Affiliations

J. P. Glickman, W. Bertozzi, T. N. Buti, S. Dixit, F. W. Hersman, C. E. Hyde-Wright, M. V. Hynes, R. W. Lourie, and B. E. Norum

  • Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

J. J. Kelly

  • Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742

B. L. Berman

  • Department of Physics, George Washington University, Washington, D.C. 20052

D. J. Millener

  • Brookhaven National Laboratory, Upton, New York 11973

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Vol. 43, Iss. 4 — April 1991

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