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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| Format: | Article |
| Language: | en_US |
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American Physical Society
2010
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| Online Access: | http://hdl.handle.net/1721.1/51380 |
| _version_ | 1826201366010265600 |
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| author | Sheikh, J. A. Nazarewicz, W. Kerman, Arthur Kent Pei, J. C. |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Sheikh, J. A. Nazarewicz, W. Kerman, Arthur Kent Pei, J. C. |
| author_sort | Sheikh, J. A. |
| collection | MIT |
| description | 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. |
| first_indexed | 2024-09-23T11:50:28Z |
| format | Article |
| id | mit-1721.1/51380 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:50:28Z |
| publishDate | 2010 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/513802022-09-27T22:17:39Z Fission Barriers of Compound Superheavy Nuclei Sheikh, J. A. Nazarewicz, W. Kerman, Arthur Kent Pei, J. C. Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Kerman, Arthur Kent Kerman, Arthur Kent 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 2010-02-05T16:37:00Z 2010-02-05T16:37:00Z 2009-05 2008-12 Article http://purl.org/eprint/type/JournalArticle 0031-9007 http://hdl.handle.net/1721.1/51380 Pei, J. C. et al. “Fission Barriers of Compound Superheavy Nuclei.” Physical Review Letters 102.19 (2009): 192501. (C) 2010 The American Physical Society. en_US http://dx.doi.org/10.1103/PhysRevLett.102.192501 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society APS |
| spellingShingle | Sheikh, J. A. Nazarewicz, W. Kerman, Arthur Kent Pei, J. C. Fission Barriers of Compound Superheavy Nuclei |
| title | Fission Barriers of Compound Superheavy Nuclei |
| title_full | Fission Barriers of Compound Superheavy Nuclei |
| title_fullStr | Fission Barriers of Compound Superheavy Nuclei |
| title_full_unstemmed | Fission Barriers of Compound Superheavy Nuclei |
| title_short | Fission Barriers of Compound Superheavy Nuclei |
| title_sort | fission barriers of compound superheavy nuclei |
| url | http://hdl.handle.net/1721.1/51380 |
| work_keys_str_mv | AT sheikhja fissionbarriersofcompoundsuperheavynuclei AT nazarewiczw fissionbarriersofcompoundsuperheavynuclei AT kermanarthurkent fissionbarriersofcompoundsuperheavynuclei AT peijc fissionbarriersofcompoundsuperheavynuclei |