Influence of nuclear structure on sub-barrier hindrance in Ni+Ni fusion

C. L. Jiang; K. E. Rehm; R. V. F. Janssens; H. Esbensen; I. Ahmad; B. B. Back; P. Collon; C. N. Davids; J. P. Greene; D. J. Henderson; G. Mukherjee; R. C. Pardo; M. Paul; T. O. Pennington; D. Seweryniak; S. Sinha; Z. Zhou

doi:10.1103/physrevlett.93.012701

arXiv · nucl-ex/0402019

Influence of nuclear structure on sub-barrier hindrance in Ni+Ni fusion

C. L. Jiang·K. E. Rehm·R. V. F. Janssens·H. Esbensen·I. Ahmad·B. B. Back·P. Collon·C. N. Davids·J. P. Greene·D. J. Henderson·G. Mukherjee·R. C. Pardo·M. Paul·T. O. Pennington·D. Seweryniak·S. Sinha·Z. Zhou

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Abstract

Fusion-evaporation cross sections for $^{64}$Ni+$^{64}$Ni have been measured down to the 10 nb level. For fusion between two open-shell nuclei, this is the first observation of a maximum in the $S$-factor, which signals a strong sub-barrier hindrance. A comparison with the $^{58}$Ni+$^{58}$Ni, $^{58}$Ni+$^{60}$Ni, and $^{58}$Ni+$^{64}$Ni systems indicates a strong dependence of the energy where the hindrance occurs on the stiffness of the interacting nuclei.

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C. L. Jiang, K. E. Rehm, R. V. F. Janssens, H. Esbensen, I. Ahmad, B. B. Back, P. Collon, C. N. Davids, J. P. Greene, D. J. Henderson, G. Mukherjee, R. C. Pardo, M. Paul, T. O. Pennington, D. Seweryniak, S. Sinha, Z. Zhou. 2004-02-25. Influence of nuclear structure on sub-barrier hindrance in Ni+Ni fusion. https://doi.org/10.1103/physrevlett.93.012701

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