dorsal/arxiv
View SchemaIs friction responsible for the reduction of fusion rates far below the Coulomb barrier?
| Authors | B. G. Giraud, S. Karataglidis, K. Amos, B. A. Robson |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0403024 |
| URL | https://arxiv.org/abs/nucl-th/0403024 |
| DOI | 10.1103/PhysRevC.69.064613 |
| Journal | Phys.Rev. C69 (2004) 064613 |
Abstract
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.
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"abstract": "The fusion of two interacting heavy ions traditionally has been interpreted\nin terms of the penetration of the projectile into the target. Observed rates\nwell below the Coulomb barrier are considerably lower than estimates obtained\nfrom penetration factors. One approach in the analysis of the data invokes\ncoupling to non-elastic channels in the scattering as the source of the\ndepletion. Another is to analyze those data in terms of tunneling in\nsemi-classical models, with the observed depletion being taken as evidence of a\n``friction\u0027\u0027 under the barrier. A complementary approach is to consider such\ntunneling in terms of a fully quantal model. We investigate tunneling with both\none-dimensional and three-dimensional models in a fully quantal approach to\ninvestigate possible sources for such a friction. We find that the observed\nphenomenon may not be explained by friction. However, we find that under\ncertain conditions tunneling may be enhanced or diminished by up to 50%, which\nfinds analogy with observation, without the invocation of a friction under the\nbarrier.",
"arxiv_id": "nucl-th/0403024",
"authors": [
"B. G. Giraud",
"S. Karataglidis",
"K. Amos",
"B. A. Robson"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.69.064613",
"journal_ref": "Phys.Rev. C69 (2004) 064613",
"title": "Is friction responsible for the reduction of fusion rates far below the Coulomb barrier?",
"url": "https://arxiv.org/abs/nucl-th/0403024"
},
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