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

Journal Article · Fri Jun 15 04:00:00 EDT 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.064612· OSTI ID:21003480

Ichikawa, Takatoshi ^[1]; Hagino, Kouichi ^[2]; Iwamoto, Akira ^[3]

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1. RIKEN Nishina Center, RIKEN, Wako, Saitama 351-0198 (Japan)
2. Department of Physics, Tohoku University, Sendai 980-8578 (Japan)
3. Japan Atomic Energy Agency, Tokai-mura, Naka-gun, Ibaraki 319-1195 (Japan)

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 that estimated with the Krappe-Nix-Sierk (KNS) potential, strongly correlates with the threshold incident energy for steep falloff of fusion cross sections observed recently for several systems at extremely low energies. This clearly indicates that the steep fall-off phenomenon can be attributed to the dynamics after the target and projectile touch with each other, e.g., the tunneling process and the nuclear saturation property in the overlap region.

• OSTI ID: 21003480
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CROSS SECTIONS
HEAVY ION FUSION REACTIONS
NUCLEAR POTENTIAL
POTENTIAL ENERGY
TUNNEL EFFECT