dorsal/arxiv
View SchemaAdiabatic quantum tunneling in heavy-ion sub-barrier fusion
| Authors | K. Hagino, N. Takigawa, M. Dasgupta, D. J. Hinde, J. R. Leigh |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9702024 |
| URL | https://arxiv.org/abs/nucl-th/9702024 |
| DOI | 10.1103/PhysRevLett.79.2014 |
| Journal | Phys.Rev.Lett. 79 (1997) 2014-2017 |
Abstract
High precision measurements of the fusion excitation functions for the reactions ^{40}Ca + ^{194}Pt, ^{192}Os clearly demonstrate that projectile excitation significantly modifies the potential barrier distribution. In sharp contrast, fusion of ^{16}O + ^{144}Sm appears to show no influence of the projectile excitation on the shape of the barrier distribution. These apparently conflicting conclusions are reconciled in this work, using realistic coupled--channels calculations, which show that high energy states produce an adiabatic potential renormalisation. This result indicates that adiabatic effects restrict, in a natural way, the states which influence the shape of a fusion barrier distribution. The analysis of barrier distributions thus offers a criterion for the relevance of the `counter term' prescription in the Caldeira-Leggett approach.
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"abstract": "High precision measurements of the fusion excitation functions for the\nreactions ^{40}Ca + ^{194}Pt, ^{192}Os clearly demonstrate that projectile\nexcitation significantly modifies the potential barrier distribution. In sharp\ncontrast, fusion of ^{16}O + ^{144}Sm appears to show no influence of the\nprojectile excitation on the shape of the barrier distribution. These\napparently conflicting conclusions are reconciled in this work, using realistic\ncoupled--channels calculations, which show that high energy states produce an\nadiabatic potential renormalisation. This result indicates that adiabatic\neffects restrict, in a natural way, the states which influence the shape of a\nfusion barrier distribution. The analysis of barrier distributions thus offers\na criterion for the relevance of the `counter term\u0027 prescription in the\nCaldeira-Leggett approach.",
"arxiv_id": "nucl-th/9702024",
"authors": [
"K. Hagino",
"N. Takigawa",
"M. Dasgupta",
"D. J. Hinde",
"J. R. Leigh"
],
"categories": [
"nucl-th",
"cond-mat",
"nucl-ex"
],
"doi": "10.1103/PhysRevLett.79.2014",
"journal_ref": "Phys.Rev.Lett. 79 (1997) 2014-2017",
"title": "Adiabatic quantum tunneling in heavy-ion sub-barrier fusion",
"url": "https://arxiv.org/abs/nucl-th/9702024"
},
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