Abstract
New data on the mechanism of decay of the giant dipole resonance in the 58Ni nucleus are obtained from an analysis of the experimental cross sections for the photonucleon reactions 58Ni(γ, p i)57Co and 58Ni(γ, n i)57Ni. The method used in this analysis takes into account both the energy spread of the dipole strength concentrated in various isospin components of the giant dipole resonance and the spread of the spectroscopic strength of the populated nucleon-hole states over the levels of the final nuclei. The entire body of experimental spectroscopic information about the levels of the final nuclei 57Co and 57Ni is employed. It is found that the probability of the semidirect mechanism of decay of the giant dipole resonance in the 57Ni nucleus lies in the range 0.16–0.3. The probability of semidirect processes is much higher in the (γ, n) channel (0.28–0.62) than in the (γ, p) channel (0.07–0.17).
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Translated from Yadernaya Fizika, Vol. 65, No. 1, 2002, pp. 3–12.
Original Russian Text Copyright © 2002 by Ishkhanov, Kapitonov, Tutyn', Shirokov.
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Ishkhanov, B.S., Kapitonov, I.M., Tutyn', I.A. et al. New data on the mechanism of decay of the giant dipole resonance in the 58Ni nucleus. Phys. Atom. Nuclei 65, 1–10 (2002). https://doi.org/10.1134/1.1446548
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DOI: https://doi.org/10.1134/1.1446548