Threshold region photoproduction of neutral π mesons off complex nuclei

G. W. Dodson, E. C. Booth, F. L. Milder, B. E. Parad, B. L. Roberts, D. R. Tieger, and J. Comuzzi
Phys. Rev. C 26, 2548 – Published 1 December 1982
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Abstract

Photoproduction of π0 mesons off targets of Li6, C12, Si28, Ca40, natural Cd, and natural Pb was studied using a bremsstrahlung beam with endpoint energies of 140, 145, 150, and 155 MeV. Photoproduction from a liquid hydrogen target was employed as a normalization. The measured yields were found to be in disagreement with published theoretical cross sections for Li6(γ, π0)Li6 and also in disagreement with a simple schematic model which assumed only coherent contributions from the M1+ multipole. The schematic model, however, did approximately predict the relative magnitudes of the yield curves for the energy range 14-20 MeV over threshold.

NUCLEAR REACTIONS Li6, C12, Si28, Ca40, Cd, Pb, (γ, π0); Eγ=140155 MeV; measured σ; test of reaction model.

  • Received 25 August 1982

DOI:https://doi.org/10.1103/PhysRevC.26.2548

©1982 American Physical Society

Authors & Affiliations

G. W. Dodson*, E. C. Booth, F. L. Milder, B. E. Parad, B. L. Roberts, and D. R. Tieger

  • Physics Department, Boston University, Boston, Massachusetts 02215

J. Comuzzi

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

  • *Present address: Laboratory for Nuclear Science, M.I.T., Cambridge, MA 02139.
  • Present address: Elscint, Inc., Brookline, MA 02146.
  • Present address: Raytheon Missile Systems, Bedford, MA 01730.

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Issue

Vol. 26, Iss. 6 — December 1982

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