Measurement of evaporation residue cross-sections of the reaction Si-30+U-238 at subbarrier energies
文献类型：会议论文
| 作者 | Nishio, K.; Hofmann, S.2,3; Hessberger, F. P.2; Ackermann, D.2; Antalic, S.4; Comas, V. F.5; Gan, Z.6; Heinz, S.2; Heredia, J. A.5; Ikezoe, H. |
| 出版日期 | 2007 |
| 关键词 | fusion reaction alpha decay spontaneous fission |
| 卷号 | 891 |
| 页码 | 71-+ |
| 英文摘要 | The abstract Si-30 + U-238 -> (268)Sg* was studied at beam energies close to the Coulomb barrier. At the above barrier energy of E-c.m. = 144.0 MeV (center- of-mass energy at half thickness of the target), we measured three decay chains of (263)Sg produced by evaporation of five neutrons. The cross-section was (67(-37)(+67)) pb. At subbarrier energy of E-c.m. = 133.0 MeV we measureed three spontaneously fissioning nuclei which we assigned to the isotope (264)Sg. The half-life of (120(-44)(+126)) ms was determined. The production cross-section was (10(-6)(+10)) pb, which is about four orders magnitude larger than the calculation based on the one-dimensional barrier penetration model in the fusion process, showing fusion enhancement caused by the prolate deformation of U-238. At E-c.m. = 128.0 MeV an upper cross-section limit of 15 pb was measured. Compared to excitation functions measured for the lighter system O-16 + U-238 -> Fm-254*, a reduction of the fusion probability was observed at low beam energies indicating increasing competition from quasifission processes. |
| 会议录 | TOURS SYMPOSIUM ON NUCLEAR PHYSICS VI
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| 会议录出版者 | AMER INST PHYSICS |
| 会议录出版地 | 2 HUNTINGTON QUADRANGLE, STE 1NO1, MELVILLE, NY 11747-4501 USA |
| 语种 | 英语 |
| WOS研究方向 | Physics |
| WOS记录号 | WOS:000245742800009 |
| 源URL | [http://119.78.100.186/handle/113462/57217]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Nishio, K. |
| 作者单位 | 1.Japan Atom Energy Agcy, Ibaraki 3191192, Japan 2.Gesell Schwerionenforsch mbH, D-64220 Darmstadt, Germany 3.Goethe Univ Frankfurt, Inst Kernphys, D-60486 Frankfurt, Germany 4.Comenius Univ, Dept Nucl Phys, Bratislava SK-84215, Slovakia 5.Higher Inst Technol & Appl Sci, Havana 10400, Cuba 6.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China 7.Univ Oulu, CUPP, FIN-86801 Pyhajarvi, Finland 8.Tohoku Univ, Nucl Sci Lab, Sendai, Miyagi 9820826, Japan 9.Joint Inst Nucl Res, Flerov Lab Nucl React, Dubna 141980, Russia 10.Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55099 Mainz, Germany |
| 推荐引用方式 GB/T 7714 | Nishio, K.,Hofmann, S.,Hessberger, F. P.,et al. Measurement of evaporation residue cross-sections of the reaction Si-30+U-238 at subbarrier energies[C]. 见:. |
入库方式： OAI收割
来源：近代物理研究所
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