New Development of Studies on Chemical Reactions in Ultrapure Quantum Solid Hydrogen at Very Low Temperature

超纯量子固体氢极低温化学反应研究新进展

• 批准号: 13640507
• 负责人: MIYAZAKI Tetsuo
• 金额: $ 2.18万
• 依托单位: Graduate School of Engineering, Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13640507/
• 关键词: H atom; Very low temperature; High resolution ESR; Solid parahydrogen; Tunneling reaction; Quantum solid; Ethyl radical; Recombination reaction

(1) High Resolution ESR Spectroscopy at Very Low TemperatureThe author proposed high resolution ESR spectroscopy by use of ultrapure solid parahydrogen. Since parahydrogen has no nuclear magnetic moments, there exist no superhyperfine interactions of a free radical with parahydrogen molecules, resulting in the very narrow ESR spectrum. For example, ESR spectrum of ethyl radicals in solid parahydrogen consists of 23 narrow lines. The structure of radicals at very low temperature can be analyzed exactly by use of this high resolution ESR spectroscopy.(2) Effect of Energy Dissipation on Tunneling Reaction in Solid ParahydrogenUntrapure solid parahydrogen is a very deficient energy acceptor like vacuum because of the lack of its interactions with reactants. The author discovered that the energy dissipation controls drastically the tunneling recombination reaction of H atoms and electron bubbles in ultapure solid parahydrogen. This is the first evidence for the effect of energy dissipation on tunneling reactions.

(1)极低温高分辨率ESR光谱作者提出了利用超纯固体仲氢的高分辨率ESR光谱。由于仲氢没有核磁矩，因此不存在自由基与仲氢分子的超超精细相互作用，导致ESR谱非常窄。例如，固体仲氢中乙基自由基的ESR谱由23条窄线组成。利用这种高分辨率ESR光谱可以准确地分析极低温度下的自由基结构。(2)能量耗散对固体仲氢中隧道反应的影响非纯固体仲氢是一种像真空一样非常缺乏的能量受体，因为它缺乏它的能量受体。与反应物的相互作用。作者发现能量耗散极大地控制了超纯固体仲氢中氢原子和电子气泡的隧道复合反应。这是能量耗散对隧道反应影响的第一个证据。

项目成果

T.Miyazaki et al.: "ESR,ENDOR and ESEEM spectroscopy study on local structure and motion of reactants: Selective tunneling radical abstraction"J.Phys.Chem.. 105・14. 3652-3557 (2001)

T. Miyazaki 等：“反应物局部结构和运动的 ESR、ENDOR 和 ESEEM 光谱研究：选择性隧道自由基抽象” J.Phys.Chem.. 105・14 (2001)。

T.Miyazaki: "Atom tunneling reaction in solid hydrogen (in Atom Tunneling Phenomena in Physics, Chemistry and Biology, edited by T. Miyazaki)"Springer-Verlag, Heidelberg, Germany. 30 (2003)

T.宫崎：“固体氢中的原子隧道反应（物理、化学和生物学中的原子隧道现象，T.宫崎编辑）”Springer-Verlag，海德堡，德国。

T.Miyazaki et al.: "Controlling factors of tunneling reactions in solid hydrogen at very low temperature"Radiat.Phys.Chem.. 60. 381-387 (2001)

T.Miyazaki 等：“极低温下固体氢中隧道反应的控制因素”Radiat.Phys.Chem.. 60. 381-387 (2001)

T.Miyazaki et al.: "High-resolution ESR spectroscopy of ethyl radicals in solid ultra pure parahydrogen"J.Chem.Phys.. 114・22. 10024-10030 (2001)

T. Miyazaki 等：“固体超纯仲氢中乙基自由基的高分辨率 ESR 光谱” J.Chem.Phys.. 114・22 (2001)。

T.Miyazaki et al.: "Large isotope effect on the tunneling chemical reaction"J.Nuclear Science Technology. (2002)

T.Miyazaki等：“大同位素对隧道化学反应的影响”J.Nuclear Science Technology。