# Origin of a maximum of the astrophysical S factor in heavy-ion fusion reactions at deep subbarrier energies

@article{Hagino2018OriginOA,
title={Origin of a maximum of the astrophysical S factor in heavy-ion fusion reactions at deep subbarrier energies},
author={Kouichi Hagino and A. Baha Balantekin and Nyein Wint Lwin and Ei Shwe Zin Thein},
journal={Physical Review C},
year={2018},
volume={97},
pages={034623}
}
• Published 29 January 2018
• Physics
• Physical Review C
The hindrance phenomenon of heavy-ion fusion cross sections at deep subbarrier energies often accompanies a maximum of an astrophysical $S$ factor at a threshold energy for fusion hindrance. We argue that this phenomenon can naturally be explained when the fusion excitation function is fitted with two potentials, with a larger (smaller) logarithmic slope at energies lower (higher) than the threshold energy. This analysis clearly suggests that the astrophysical $S$ factor provides a convenient…
3 Citations

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## References

SHOWING 1-10 OF 35 REFERENCES

### Transition from subbarrier to deep-subbarrier regimes in heavy-ion fusion reactions

• Physics
• 2012
We analyze recent experimental data of heavy-ion fusion cross sections available up to deep-subbarrier energies in order to discuss the threshold incident energy for a deep-subbarrier fusion

### Fusion Cross Sections at Deep Sub-barrier Energies

• Physics
• 2003
A recent publication reports that heavy-ion fusion cross sections at extreme subbarrier energies show a continuous change of their logarithmic slope with decreasing energy, resulting in a much

### Recent developments in heavy-ion fusion reactions

• Physics
• 2014
In this review the main advances in heavy-ion fusion research that have taken place over the last decade are addressed. During this period, experimental studies have been extended to deep subbarrier

### Signature of smooth transition from sudden to adiabatic states in heavy-ion fusion reactions at deep sub-barrier energies.

• Physics
Physical review letters
• 2009
A novel extension of the standard coupled-channels framework for heavy-ion reactions in order to analyze fusion reactions at deep-sub-barrier incident energies simulates a smooth transition between the two-body and the adiabatic one-body states.

### Unexpected behavior of heavy-ion fusion cross sections at extreme sub-barrier energies.

• Physics
Physical review letters
• 2002
The excitation function for fusion evaporation in the (60)Ni+ (89)Y system was measured over a range in cross section covering 6 orders of magnitude. The cross section exhibits an abrupt decrease at

### Damping of Quantum Vibrations Revealed in Deep Sub-barrier Fusion

• Physics
• 2013
Heavy-ion fusion reactions at low incident energies serve as an important probe for investigating the fundamental properties of the potential tunneling of many-body quantum systems. When two nuclei

### Recent experimental results in sub- and near-barrier heavy-ion fusion reactions

• Physics
• 2017
Abstract.Recent advances obtained in the field of near and sub-barrier heavy-ion fusion reactions are reviewed. Emphasis is given to the results obtained in the last decade, and focus is mainly on

### Systematics of threshold incident energy for deep sub-barrier fusion hindrance

• Physics
• 2007
We systematically evaluate the potential energy at the touching configuration for heavy-ion reactions using various potential models. We point out that the energy at the touching point, especially

### Hindrance of heavy-ion fusion due to nuclear incompressibility.

• Physics
Physical review letters
• 2006
A good agreement is reported with the data of coupled-channels calculation for the 64Ni + 64Ni combination using the double-folding potential with Michigan-3-Yukawa-Reid effective N - N forces supplemented with a repulsive core that reproduces the nuclear incompressibility for total overlap.