Threshold Photoneutron Cross Section for Be9

B. L. Berman, R. L. Van Hemert, and C. D. Bowman
Phys. Rev. 163, 958 – Published 20 November 1967; Erratum Phys. Rev. 168, 1414 (1968)
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Abstract

The Be9 (γ,n) Be8 cross section was measured as a function of photon energy from less than 1 to about 40 keV threshold, by the threshold photoneutron technique. The cross section rises sharply to a maximum of 1.6 mb at 6 keV above threshold and then decreases slowly to 1.2 mb at 40 keV. An attempt was made to fit these data, and earlier data obtained from monoenergetic γ-ray source measurements, with a curve of the Breit-Wigner form in order to examine the possibility that the shape of the cross section is influenced primarily by a single level near threshold. The results show that such a curve is inadequate to explain the data, and thus indicate that a more complex theory and even better data are needed to understand fully the nature of the cross section near threshold for the Be9(γ,n) reaction.

  • Received 10 July 1967

DOI:https://doi.org/10.1103/PhysRev.163.958

©1967 American Physical Society

Erratum

Threshold Photoneutron Cross Section for Be9

B. L. Berman, R. L. Van Hemert, and C. D. Bowman
Phys. Rev. 168, 1414 (1968)

Authors & Affiliations

B. L. Berman, R. L. Van Hemert*, and C. D. Bowman

  • Lawrence Radiation Laboratory, University of California, Livermore, California

  • *Major, United States Air Force. The views expressed herein are those of the author and do not necessarily reflect the views of the United States Air Force or the Department of Defense.

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Vol. 163, Iss. 4 — November 1967

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