Attempts to chemically investigate element 112
文献类型：期刊论文
| 作者 | Eichler, R; Bruchle, W; Buda, R; Burger, S; Dressler, R; Dullmann, CE; Dvorak, J; Eberhardt, K; Eichler, B; Folden, CM |
| 刊名 | RADIOCHIMICA ACTA
 |
| 出版日期 | 2006 |
| 卷号 | 94页码:181-191 |
| 关键词 | adsorption transactinides element 112 thermochromatography |
| ISSN号 | 0033-8230 |
| DOI | 10.1524/ract.2006.94.4.181 |
| 英文摘要 | Two experiments aiming at the chemical investigation of element 112 produced in the heavy ion induced nuclear fusion reaction of Ca-48 with U-238 were performed at the Geselischaft fur Schwerionenforschung (GSI), Darmstadt, Germany. Both experiments were designed to determine the adsorption enthalpy of element 112 on a gold surface using a thermochromatography setup. The temperature range covered in the thermochromatography experiments allowed the adsorption of Hg at about 35 degrees C and of Rn at about - 180 degrees C. Reports from the Flerov Laboratory for Nuclear Reactions (FLNR), Dubna, Russia claim production of a 5-min spontaneous fission (SF) activity assigned to 2111 12 for the U-238 (Ca-48,3n) (283)112 reaction. Hence, Experiment I was designed to detect spontaneously fissioning (SF) isotopes of elernent 112 with half-lives (t(1/2)) longer than about 20 s. 11 high-energy events were detected. 7 events exhibit a deposlition pattern resembling a chromatographic peak in the vicinity of Rn deposition. However, the energy of the events observed in Experiment I was lower than expected for a SF-decay of (283)112. Therefore, these events could not be unambiguously attributed to the decay of (283)112. In contradiction with earlier publications newer reports from FLNR Dubna claim that (283)12 decays by a-particle ernission (E-alpha = 9.5 MeV) with t(1/2) = 4 s followed by a SF-decay of (279)Ds (t(1/2) = 0.2 s). Therefore, Experiment II was designed to be sensitive to both claimed decay properties of (283)112. However, during this experiment neither short alpha-SF correlations nor SF coincidences were detected. The conclusion is that (283)112 was not unambiguously detected, neither in Experiment I nor in Experiment II. |
| WOS关键词 | SUPERHEAVY ELEMENTS ; HEAVIEST ELEMENTS ; METAL-SURFACES ; ION REACTIONS ; ADSORPTION ; NUCLEAR ; HASSIUM ; RADON ; SEPARATOR ; CHEMISTRY |
| WOS研究方向 | Chemistry ; Nuclear Science & Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000237191900001 |
| 出版者 | WALTER DE GRUYTER GMBH |
| 源URL | [http://119.78.100.186/handle/113462/27025]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Eichler, R |
| 作者单位 | 1.Paul Scherrer Inst, Labor Radio & Umweltchem, CH-5232 Villigen, Switzerland 2.Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland 3.Gesellsch Schwerionforsch mbH, D-64291 Darmstadt, Germany 4.Johannes Gutenberg Univ Mainz, Inst Kernchem, D-55099 Mainz, Germany 5.Lawrence Berkeley Lab, Nucl Sci Div, Berkeley, CA 94720 USA 6.Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA 7.Tech Univ Munich, Inst Radiochem, D-85748 Garching, Germany 8.Saha Inst Nucl Phys, Chem Sci Div, Kolkata 700064, India 9.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Eichler, R,Bruchle, W,Buda, R,et al. Attempts to chemically investigate element 112[J]. RADIOCHIMICA ACTA,2006,94:181-191. |
| APA | Eichler, R.,Bruchle, W.,Buda, R.,Burger, S.,Dressler, R.,...&von Zweidorf, A.(2006).Attempts to chemically investigate element 112.RADIOCHIMICA ACTA,94,181-191. |
| MLA | Eichler, R,et al."Attempts to chemically investigate element 112".RADIOCHIMICA ACTA 94(2006):181-191. |
入库方式： OAI收割
来源：近代物理研究所
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