<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">Ca</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>40</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span> photoneutron cross section above the giant dipole resonance

J. A. Eden; G. J. O’Keefe; R. P. Rassool; D. J. McLean; M. N. Thompson; T. Suda; I. Nomura; J. Yokokawa; O. Konno; T. Terasawa; Y. Torizuka

doi:10.1103/PhysRevC.44.753

${}^{40}{Ca}$ photoneutron cross section above the giant dipole resonance

J. A. Eden, G. J. O’Keefe, R. P. Rassool, D. J. McLean, M. N. Thompson, T. Suda, I. Nomura, J. Yokokawa, O. Konno, T. Terasawa, and Y. Torizuka

Phys. Rev. C 44, 753 – Published 1 August 1991; Erratum Phys. Rev. C 46, 385 (1992)

Abstract

The ${}^{40}{Ca}$ (γ,n) reaction cross section has been measured with tagged photons with energies ranging from 31.2 to 102 MeV, for neutron emission angles of 45°, 60°, 75°, 90°, and 135°. Exclusive differential cross sections for the ${}^{40}{Ca}$ (γ,n) and ${}^{40}{Ca}$ (γ,p) reactions are found to be of a similar magnitude, but are not well predicted by recent random-phase-approximation and relativistic direct knock-out calculations. A quasideuteron model calculation with spin-orbit splitting of single-particle shells and an improved nucleon transparency correction is found to be consistent with the data. However, it is shown that this does not establish that the photoabsorption matrix element for the deuteron is necessarily similar to that of a correlated np-pair in nuclear matter. This result is generalized to question the predicted sensitivity to short-range correlations for photonuclear reactions calculated within the Gottfried factorization.

Received 4 February 1991

DOI:https://doi.org/10.1103/PhysRevC.44.753

Erratum

Erratum: ${}^{40}{Ca}$ photoneutron cross section above the giant dipole resonance

J. A. Eden, G. J. O'Keefe, R. P. Rassool, D. J. McLean, M. N. Thompson, T. Suda, I. Nomura, J. Yokokawa, O. Konno, T. Terasawa, and Y. Torizuka

Phys. Rev. C 46, 385 (1992)

Authors & Affiliations

J. A. Eden, G. J. O’Keefe, R. P. Rassool, D. J. McLean, and M. N. Thompson

School of Physics, The University of Melbourne, Parkville, Victoria 3052, Australia

T. Suda, I. Nomura, J. Yokokawa, O. Konno, T. Terasawa, and Y. Torizuka

Laboratory of Nuclear Science, Tohoku University, Mikamine, Sendai 982, Japan

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Vol. 44, Iss. 2 — August 1991

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