Abstract
Double-differential cross sections for neutron production were measured by the time-of-flight method for the interactions between carbon nuclei of energy 2 GeV per nucleon and carbon, aluminum, copper, cadmium, and lead nuclei. These measurements were performed for angles of 30°, 53°, and 90° in the neutron-energy range fromseveral hundred keVunits to 300MeV. The phenomenologicalmodel of four moving sources was used as a basis in analyzing experimental results and in estimating the contribution to neutron emission from various reaction stages. The temperature parameters determined from the slope of the neutron energy spectra proved to be 22 ± 2 MeV for a hot source (fireball) and 4.5 ± 0.3 MeV for the stage of thermal fragmentation of highly excited heavy nuclear residues. The relative contribution of these two sources to the total neutron yield is independent of the type of the target nucleus and is about 42%, on average.
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Original Russian Text © V.I. Yurevich, R.M. Yakovlev, V.G. Lyapin, 2012, published in Yadernaya Fizika, 2012, Vol. 75, No. 2, pp. 214–224.
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Yurevich, V.I., Yakovlev, R.M. & Lyapin, V.G. Neutron production in collisions between carbon nuclei of energy 2 GeV per nucleon and carbon, aluminum, copper, cadmium, and lead nuclei. Phys. Atom. Nuclei 75, 192–202 (2012). https://doi.org/10.1134/S1063778812010164
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DOI: https://doi.org/10.1134/S1063778812010164