Electron Momentum Distribution of Liquid Metals by High Resolution Compton Scattering

通过高分辨率康普顿散射测量液态金属的电子动量分布

• 批准号: 01460039
• 负责人: ITOH Fumitake
• 金额: $ 0.32万
• 依托单位: Gunma University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-01460039/
• 关键词: Compton Scattering; Liquid Metal; Alkalline Metal; Gallium; Lithium; Sodium; Synchrotron Radiation; コンプトンプロファイル; 放射光; フェルミ運動量; インジウムアンチモン

The purpose of this research project is to study the electron momentum density of simple liquid metals and non-simple liquid metals such as Li-Ga using high resolution Compton scattering spectrometer installed at KEK-PF and KEK-AR.Liquid alkalline metals were studied using Compton spectrometer at KEK-PF which have the momentum resolution of 0.09 atomic unit, the highest resolution in the world. Changes of Compton plofiles upon melting in Li and Na showed the narrowing in the shape of the profile. The great blurring of the Fermi momentum in liquid Li-Na alloy compared to that in pure metals should be noticed.Liquid Li-Ga alloy were investigated using a new Compton spectrometer constructed newly at KEK-AR with the momentum resolution of 0.12 atomic unit at the incident energy of 60 keV. The Compton profile change of pure Ga showed an increase upon melting in contrast to alkaline metals. This suggest that the Fermi momentum of Ga increases upon melting. It is no be noticed that the change of the Compton profile of liquid Li_0._9Ga_0._1 alloy was similar to liquid Ga casa. No noticeable decrease of the Fermi momentum has been observed.From the theorerical side, the effeects of phase-transition from diamond-type to NaCL-type structure of InSb on momentum disribution have been studied in terms of pseudo-potetial theory.

本研究项目的目的是利用安装在KEK-PF和KEK-AR的高分辨率康普顿散射谱仪研究简单液态金属和非简单液态金属（如Li-Ga）的电子动量密度。在Li和Na中熔化后的康普顿曲线的变化表明轮廓形状变窄。利用KEK-AR新研制的康普顿谱仪，在入射能量为60 keV时，对液态Li-Ga合金进行了研究，其动量分辨率为0.12原子单位。纯镓的康普顿轮廓变化显示出增加熔化时，相反，碱金属。这表明Ga的费米动量在熔化时增加。液态Li_0. 9Ga_0._ 1合金与液态Ga casa相似。从理论上，用赝势理论研究了InSb从金刚石型结构到NaCl型结构的相变对动量分布的影响。

项目成果

伊藤 文武: "コンプトン散乱、「シンクロトロン放射利用技術」第2章 第2節、" サイエンスフォ-ラム社, 6 (1989)

Fumitake Ito：“康普顿散射，‘同步加速器辐射利用技术’第 2 章第 2 节”，科学论坛出版，6 (1989)

H.Kawata: "Commisioning of waterーcooled quasiーdoublyーbent crystal monochromator for Compton scattering experiment" Rev.Sci.Instrum.

H.Kawata：“用于康普顿散射实验的水冷准双弯曲晶体单色仪的调试”Rev.Sci.Instrum。

F.Itoh: "High Resolution Compton Profiles of Liquid Li,Na and Li-Na Alloy" Journal of Non-Crystalline Solids. (1990)

F.Itoh：“液态锂、钠和锂钠合金的高分辨率康普顿剖面”非晶固体杂志。

D.N.Timms: "ComptonScatteringStudiesoftheValenceElectronDensityDistributioninGaAs" .J.Phys;Condens.Matter. 2. 10517-10528 (1990)

D.N.Timms：“GaAs 价电子密度分布的康普顿散射研究”.J.Phys；Condens.Matter。

F.Itoh: "A cluster model calculation of electronic structure in FeーBamorphous alloy" J.NonーCryst.Sol,. 117/118. 320-323 (1990)

F.Itoh：“Fe-Bamorphous 合金中电子结构的簇模型计算”J.Non-Cryst.Sol，117/118 (1990)。