Effect of neutron-excess on above-barrier fusion cross-sections in $^{12−15}$C + $^{12}$C: Evidence for increasing neutron dynamics
ORAL
Abstract
Examination of the average fusion cross-section at energies above the fusion barrier for $^{12,13,14,15}$C + $^{12}$C reveals that the fusion cross-section increases more rapidly than can be simply attributed to the increased size. Comparison with static barrier penetration models suggests that dynamics are the origin of this increased cross-section. Calculations with a time-dependent Hartree-Fock model also fail to describe the observed trend suggesting that for neutron-rich nuclei, neutron dynamics may play a larger role than is presently accounted for.
*This work was supported by the U.S. Department of Energy under Grant No. DE-FG02-88ER-40404 (Indiana University). CJH is supported in part by U.S. DOE grants DE-FG02- 87ER40365 and DE-SC0018083. ZL gratefully acknowl- edges support from National Science Foundation under PHY-1613708 and DOE grant DE-SC0019470 (Arizona State University)
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