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arXiv · 2011.01806

Potential roots of the deep sub-barrier heavy-ion fusion hindrance phenomenon

P. W. Wen·C. J. Lin·R. G. Nazmitdinov·S. I. Vinitsky·O. Chuluunbaatar·A. A. Gusev·A. K. Nasirov·H. M. Jia·A. Gozdz
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Abstract

We analyse the origin of the unexpected deep sub-barrier heavy-ion fusion hindrance in 64Ni+100Mo and 28Si+64Ni recations. Our analysis is based on the improved coupled-channels approach, implemented by means of the finite element method. With the aid of the Woods-Saxon potential the experimental cross sections and the S-factors of these reactions are remarkably well reproduced. We found that the account on the non-diagonal matrix elements of the coupling matrix, traditionally neglected in the conventional coupled-channels approaches in setting the left boundary conditions inside the potential pocket, and its minimal value are crucially important for the interpretation experimental data. Within our approach we found a good agreement with the experimental data for the S-factor of the fusion reaction 12C+12C, which has no a pronounced maximum for this system.

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P. W. Wen, C. J. Lin, R. G. Nazmitdinov, S. I. Vinitsky, O. Chuluunbaatar, A. A. Gusev, A. K. Nasirov, H. M. Jia, A. Gozdz. 2020-11-03. Potential roots of the deep sub-barrier heavy-ion fusion hindrance phenomenon. https://doi.org/10.1103/physrevc.103.054601

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