Fission Barriers of Compound Superheavy Nuclei
The dependence of fission barriers on the excitation energy of the compound nucleus impacts the survival probability of superheavy nuclei synthesized in heavy-ion fusion reactions. In this work, we investigate the isentropic fission barriers by means of the self-consistent nuclear density functional...
| Main Authors: | , , , |
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| Other Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society,
2010-02-05T16:37:00Z.
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| Subjects: | |
| Online Access: | Get fulltext |
| Summary: | The dependence of fission barriers on the excitation energy of the compound nucleus impacts the survival probability of superheavy nuclei synthesized in heavy-ion fusion reactions. In this work, we investigate the isentropic fission barriers by means of the self-consistent nuclear density functional theory. The relationship between isothermal and isentropic descriptions is demonstrated. Calculations have been carried out for [superscript 264]Fm, [superscript 272]Ds, [superscript 278]112, [superscript 292]114, and [superscript 312]124. For nuclei around 278112 produced in "cold-fusion" reactions, we predict a more rapid decrease of fission barriers with excitation energy as compared to the nuclei around [superscript 292]114 synthesized in "hot-fusion" experiments. This is explained in terms of the difference between the ground-state and saddle-point temperatures. The effect of the particle gas is found to be negligible in the range of temperatures studied. National Nuclear Security Administration under the Stewardship Science Academic Alliances program Department of Energy |
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