Excitation of High-Spin Particle-Hole States in Si28 by Pion Inelastic Scattering

Phys. Rev. Lett. 43, 612 – Published 27 August 1979
C. Olmer, B. Zeidman, D. F. Geesaman, T. -S. H. Lee, R. E. Segel, L. W. Swenson, R. L. Boudrie, G. S. Blanpied, H. A. Thiessen, C. L. Morris, and R. E. Anderson

Abstract

The inelastic scattering of 162-MeV π+ and π- by Si28 was studied at larger momentum transfer. Several high-spin particle-hole states are observed to be preferentially excited in this reaction. These include the 9.70-MeV (5-,T=0), 11.58-MeV (6-,T=0) and 14.36-MeV (6-,T=1) states. The ratios of the cross sections of the 6-, T=0 state to the 6-, T=1 state are 1.5-0.2+0.4 for π+ and 1.7±0.4 for π-, in contrast to ratios of about 4 predicted by simple distorted-wave impulse-approximation calculations.

DOI: http://dx.doi.org/10.1103/PhysRevLett.43.612

  • Received 21 June 1979
  • Published in the issue dated 27 August 1979

© 1979 The American Physical Society

Authors & Affiliations

C. Olmer, B. Zeidman, D. F. Geesaman, and T. -S. H. Lee

  • Argonne National Laboratory, Arognne, Illinois 60439

R. E. Segel

  • Northwestern University, Evanston, Illinois 60201

L. W. Swenson

  • Oregon State University, Corvallis, Oregon 97331

R. L. Boudrie

  • University of Colorado, Boulder, Colorado 80302, and Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545

G. S. Blanpied

  • New Mexico State University, Las Cruces, New Mexico 88001

H. A. Thiessen, C. L. Morris, and R. E. Anderson

  • Los Alamos Scientific Laboratory, Los Alamos, New Mexico 87545

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