Abstract
In calculating cross sections for the electromagnetic dissociation of heavy ions by the Weizsäcker-Williams method, use is made of approximations and extrapolations of experimental data on photonuclear reactions. On the basis of the predicted cross sections for the mutual dissociation of nuclei in beams of ultrarelativistic colliders, it is proposed to measure, among other things, the yields of neutrons from such a dissociation in order to monitor the luminosity of accelerators. Considerable discrepancies between the results of different photonuclear experiments impose limitations on the accuracy of the method. The reasons behind these discrepancies are determined on the basis of a systematic analysis of available data on the cross sections for photoneutron reactions, and a method for removing them is proposed. By considering the example where new data on the dissociation of 208Pb nuclei at an energy of 30 GeV per nucleon are compared with the results of calculations, it is shown that the use of evaluated cross sections for partial photoneutron reactions of the (γ, n) and (γ, 2n) types makes it possible to improve the accuracy in calculating cross sections for electromagnetic dissociation.
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Translated from Yadernaya Fizika, Vol. 67, No. 12, 2004, pp. 2145–2156.
Original Russian Text Copyright © 2004 by Varlamov, Ishkhanov, Peskov, Stepanov, Pshenichnov.
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Varlamov, V.V., Ishkhanov, B.S., Peskov, N.N. et al. Electromagnetic dissociation of ultrarelativistic heavy ions and cross sections for photonuclear reactions in the region of a giant resonance. Phys. Atom. Nuclei 67, 2122–2133 (2004). https://doi.org/10.1134/1.1842290
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DOI: https://doi.org/10.1134/1.1842290