Signature of Smooth Transition from Sudden to Adiabatic States in Heavy-Ion Fusion Reactions at Deep Sub-Barrier Energies

Journal Article · Fri Nov 13 00:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.202701· OSTI ID:21370834

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

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1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (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 propose 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. This extension simulates a smooth transition between the two-body and the adiabatic one-body states. To this end, we damp gradually the off-diagonal part of the coupling potential, for which the position of the onset of the damping varies for each eigenchannel. We show that this model accounts well for the steep falloff of the fusion cross sections for the {sup 16}O+{sup 208}Pb, {sup 64}Ni+{sup 64}Ni, and {sup 58}Ni+{sup 58}Ni reactions.

• OSTI ID: 21370834
• Journal Information: Physical Review Letters, Vol. 103, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.103.202701; (c) 2009 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLIDING BEAMS
COUPLED CHANNEL THEORY
CROSS SECTIONS
HEAVY ION FUSION REACTIONS
LEAD 208
LEAD 208 TARGET
NICKEL 58
NICKEL 58 BEAMS
NICKEL 58 REACTIONS
NICKEL 58 TARGET
NICKEL 64
NICKEL 64 REACTIONS
NICKEL 64 TARGET
OXYGEN 16
OXYGEN 16 BEAMS
OXYGEN 16 REACTIONS
TWO-BODY PROBLEM
BEAMS
EVEN-EVEN NUCLEI
HEAVY ION REACTIONS
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
ION BEAMS
ISOTOPES
LEAD ISOTOPES
LIGHT NUCLEI
MANY-BODY PROBLEM
NICKEL ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUCLEOSYNTHESIS
OXYGEN ISOTOPES
STABLE ISOTOPES
SYNTHESIS
TARGETS