Single Atom Chemistry for Heavy Elements (Redox Reaction of Nobelium)

重元素的单原子化学（诺贝尔的氧化还原反应）

• 批准号: 14340207
• 负责人: SHINOHARA Atsushi
• 金额: $ 9.09万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340207/
• 关键词: Heavy Elements; Nobelium; Trasactinides; Heavy Actinides; Rapid Chemistry; Single Atom Chemistry; Solvent Extraction; 単一原子電解法

The chemical properties of heavy elements beyond mendelevium (_<101>Md) have not well been known. These superheavy elements are available in quantities of only a few atoms at a time throughout the experiments, due to their short-lives and their extremely small production rates with a heavy-ion accelerator. Therefore, rapid and efficient radiochemical procedures must be employed, in which each of the available atoms rapidly reaches equilibrium through many of the same reactions. Gas-jet transport system, combined with the following chemical separation system using a chromatographical technique, is commonly adopted for the accelerator online chemistry of superheavy elements.The purposes of the present study are to construct the chemical apparatus applicable to more flexible chemical treatments and to find a best condition of on-line chemistry for heavy actinides. We also attempted to measure the ionic radius of No3+ by a cation-exchange chromatography with an a-hydroxyisobutyrate fluent and a PbO2 oxidant at the JAERI Tandem accelerator, in order to reveal the influence of the relativistic effect on an actinide contraction. The development of three types of chemical reaction cells (or columns) and a new liquid scintillation counter system for on-line a-ray measurements are in progress at present.

钔(_<101>Md)以外的重元素的化学性质尚不清楚。在整个实验过程中，这些超重元素一次只能获得几个原子的数量，因为它们的寿命很短，而且重离子加速器的生产率极低。因此，必须采用快速有效的放射化学程序，其中每个可用原子通过许多相同的反应快速达到平衡。气体喷射传输系统与随后采用色谱技术的化学分离系统相结合，通常用于超重元素的加速器在线化学。本研究的目的是构建适用于更灵活的化学处理的化学装置，并找到重锕系元素在线化学的最佳条件。我们还尝试在 JAERI Tandem 加速器上使用α-羟基异丁酸酯流体和 PbO2 氧化剂通过阳离子交换色谱法测量 No3+ 的离子半径，以揭示相对论效应对锕系元素收缩的影响。目前正在开发三种类型的化学反应池（或柱）和一种用于在线a射线测量的新型液体闪烁计数器系统。

项目成果

Y.Nagame, et al.: "Production cross sections of ^<261>Rf and ^<262>Db in bombardments of ^<248>Cm with ^<18>O and ^<19>F ions"J.Nucl.Radiochem.Sci.. 3. 85-88 (2002)

Y.Nagame等人：“用^<18>O和^<19>F离子轰击^<248>Cm时^<261>Rf和^<262>Db的生产横截面”J.Nucl。

W.Sato, et al.: "Time-differential Perturbaed Angular Correlation of ^<140>Ce Implanted in Highly Criented Pyrolytic Graphite"J.Nucl Radiochem.Sci.. 4. 15-18 (2003)

W.Sato等人：“在高临界热解石墨中植入^<140>Ce的时间微分扰动角相关性”J.Nucl Radiochem.Sci..4.15-18(2003)

H.Haba, et al.: "Fluroride Complexation of Element 104, Rutherfordium"J.Am.Chem.Soc.. (予定). (2004)

H.Haba 等人：“元素 104，卢瑟福的氟化物络合”J.Am.Chem.Soc.（计划）（2004 年）。

T.Ohtsuki, et al.: "Se-atom incorporation in fullerene by using nuclear recoil and Ab-initio MD simulations"Phys. Rev. B. 65. 073402(1)-073402(4) (2002)

T.Ohtsuki 等人：“利用核反冲和从头算 MD 模拟将 Se 原子掺入富勒烯中”Phys。

N.takahashi: "Boiling points of the superheavy elements 117 and 118"J.Radioanal.Nucl.Chem.. 251. 299-301 (2002)

N.takahashi：“超重元素 117 和 118 的沸点”J.Radioanal.Nucl.Chem.. 251. 299-301 (2002)