Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2004-03-09
Phys.Rev. C69 (2004) 064613
Physics
Nuclear Physics
Nuclear Theory
18 pages, 15 figures embedded
Scientific paper
10.1103/PhysRevC.69.064613
The fusion of two interacting heavy ions traditionally has been interpreted in terms of the penetration of the projectile into the target. Observed rates well below the Coulomb barrier are considerably lower than estimates obtained from penetration factors. One approach in the analysis of the data invokes coupling to non-elastic channels in the scattering as the source of the depletion. Another is to analyze those data in terms of tunneling in semi-classical models, with the observed depletion being taken as evidence of a ``friction'' under the barrier. A complementary approach is to consider such tunneling in terms of a fully quantal model. We investigate tunneling with both one-dimensional and three-dimensional models in a fully quantal approach to investigate possible sources for such a friction. We find that the observed phenomenon may not be explained by friction. However, we find that under certain conditions tunneling may be enhanced or diminished by up to 50%, which finds analogy with observation, without the invocation of a friction under the barrier.
Amos Ken
Giraud B. G.
Karataglidis Steven
Robson B. A.
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