TY - JOUR
T1 - Existence of a one-body barrier revealed in deep subbarrier fusion
AU - Ichikawa, Takatoshi
AU - Hagino, Kouichi
AU - Iwamoto, Akira
N1 - Copyright:
Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2007/5/22
Y1 - 2007/5/22
N2 - Based on the adiabatic picture for heavy-ion reactions, in which the neck formation in the one-body system is taken into account, we propose a two-step model for fusion cross sections at deep sub-barrier energies. This model consists of the capture process in the two-body potential pocket, which is followed by the penetration of the adiabatic one-body potential to reach a compound state after the touching configuration. We describe the former process with the coupled-channels framework, while the latter with the Wentzel-Kramers-Brillouin (WKB) approximation by taking into account the coordinate dependent inertia mass. The effect of the one-body barrier is important at incident energies below the potential energy at the touching configuration. We show that this model well accounts for the steep fall-off phenomenon of fusion cross sections at deep sub-barrier energies for the Ni64+Ni64 and Ni58+Ni58 reactions.
AB - Based on the adiabatic picture for heavy-ion reactions, in which the neck formation in the one-body system is taken into account, we propose a two-step model for fusion cross sections at deep sub-barrier energies. This model consists of the capture process in the two-body potential pocket, which is followed by the penetration of the adiabatic one-body potential to reach a compound state after the touching configuration. We describe the former process with the coupled-channels framework, while the latter with the Wentzel-Kramers-Brillouin (WKB) approximation by taking into account the coordinate dependent inertia mass. The effect of the one-body barrier is important at incident energies below the potential energy at the touching configuration. We show that this model well accounts for the steep fall-off phenomenon of fusion cross sections at deep sub-barrier energies for the Ni64+Ni64 and Ni58+Ni58 reactions.
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U2 - 10.1103/PhysRevC.75.057603
DO - 10.1103/PhysRevC.75.057603
M3 - Article
AN - SCOPUS:34547350785
VL - 75
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
SN - 0556-2813
IS - 5
M1 - 057603
ER -