Heavy-ion fusion: Channel-coupling effects, the barrier penetration model, and the threshold anomaly for heavy-ion potentials
We study the formal structure of the influence of channel coupling on near- and sub-barrier fusion. The reduction to a one-channel description is studied, with emphasis on the channel-coupling effects being manifest primarily as an energy dependence (the ''threshold anomaly'') of the real nuclear potential. The relation to the barrier penetration model is examined critically. The results of large-scale coupled-channel calculations are used as ''data'' to illustrate the discussion. Particular emphasis is placed on the importance of reproducing correctly the partial-wave (or ''spin'') distributions. The simple barrier penetration model is found to be adequate to exhibit the strong enhancements due to channel couplings when the threshold anomaly is taken into account, although there may be important corrections due to the long-ranged peripheral absorption, especially from Coulomb excitation. copyright 1987 Academic Press, Inc.
- Research Organization:
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6373
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5954654
- Journal Information:
- Ann. Phys. (N.Y.); (United States), Vol. 178:1
- Country of Publication:
- United States
- Language:
- English
Similar Records
Elastic scattering threshold anomaly and near-barrier heavy-ion fusion
Heavy-Ion Fusion near and below the Coulomb Barrier: New Results
Related Subjects
HEAVY ION FUSION REACTIONS
COUPLED CHANNEL THEORY
OPTICAL MODELS
LEAD 208 TARGET
OXYGEN 16 REACTIONS
TITANIUM 46 REACTIONS
ZIRCONIUM 90 TARGET
COULOMB FIELD
CROSS SECTIONS
MEV RANGE 10-100
MEV RANGE 100-1000
NUCLEAR POTENTIAL
PARTIAL WAVES
CHARGED-PARTICLE REACTIONS
ELECTRIC FIELDS
ENERGY RANGE
HEAVY ION REACTIONS
MEV RANGE
NUCLEAR REACTIONS
POTENTIALS
TARGETS
653003* - Nuclear Theory- Nuclear Reactions & Scattering