Fusion cross section for 13C + 13C at low energies |
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Authors: | Mohan L. Chatterjee Luc Potvin Bibiana Čujec |
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Affiliation: | 1. Laboratoire de Physique Nuclèaire, Départment de Physique, Universitè Laval, Québec, Canada G1K 7P4;2. Foster Radiation Laboratory, McGill University, Montràl, Canada H3A 2B2;4. W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA |
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Abstract: | The energy dependence of the fusion cross section has been measured over the range Ec.m. = 3.05–6.88 MeV by detecting the γ-rays from residual nuclei in a 4π geometry. Analyzing the 1.37 MeV photopeak, originating from , the cross sections for 24Mg+2n channel were also deduced. The measured fusion cross sections have been compared with those for 12C + 12C and 12C + 13C systems and found to be significantly different. For 13C+13C the fusion cross sections agree with the standard optical-model prediction down to the lowest measured energies, while for 12C + 12C and 12C + 13C they are, at the lowest energies, too low. It is suggested that the unpaired valence nucleons facilitate fusion at energies well below the Coulomb barrier. |
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Keywords: | Nuclear reactions |
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