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液态氦
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  liquid helium
     Ab initio Calculation of the Effective Inter-Atomic Pair Potential in Liquid Helium
     采用从头计算方法研究液态氦原子间等效对势
短句来源
     The variational fluid perturbation theory is used to calculate the single and doubleshock Hugoniot curves of liquid helium by means of a two-body potential function.
     采用孤立氦原子两体排斥势和微扰变分液体理论计算了液态氦一次和二次冲击压缩曲线。
短句来源
     The nonlin ear self -action term a|Ψ 2 |Ψof equation give out a minimal energy state. It makes the particle energy not being dissipation,and constructs a single stable soliton with a unlimited wave length. It is an important result and gives us a new knowledge about the basic characteristics of super f low liquid helium.
     结果证明,处于超流状态下的液态氦原子是一种奇特的孤立子,方程中的非线性自相互作用项a|Ψ2|Ψ提供了一个能量小态,防止了粒子能量弥散,从而形成了波长为无穷大的、孤单的一个稳定孤立子.
短句来源
     Ab initio Hartree-Fock self-consistent-field(SCF) technique and the atomic cluster method have been applied to study the effective inter-atomic pair potential in liquid helium. The atomic cluster(He)_9 with BCC geometry(only taking the first neighbors into account) is used to stimulate the average atomic configuration in liquid states.
     提出了一种具有体心立方排列的原子团簇He9模型,用于模拟液氦中邻近原子的近程平均分布特征,并运用量子从头计算方法和原子团簇理论计算技术,首次从理论上计算了液态氦原子间等效作用对势。
短句来源
  “液态氦”译为未确定词的双语例句
     THEORETICALCALCULATIONFOKTHEHUGONIOT CURVESOFLIQUIDHELIUM
     液态氦冲击压缩性理论计算
短句来源
     A Study on Soliton in Super Flow Liqui d Helium
     超流性液态氦中的孤立子研究
短句来源
     He was also the first person who successfully liquefied helium on the 10th of July, 1908, and discovered the phenomenon of superconductivity in 1911.
     1908年7月10日他最先成功地制备出液态氦,并且在1911年首次发现超导电性。
短句来源
     The physical mechanism which probably causesthis unusual“soften”phenomena and its theoretical treatment methods are discussed as well.
     文中分析讨论了引起液态氦在高压下异常“软化”现象的可能机制和理论处理方法。
短句来源
  相似匹配句对
     THEORETICALCALCULATIONFOKTHEHUGONIOT CURVESOFLIQUIDHELIUM
     液态冲击压缩性理论计算
短句来源
     A Study on Soliton in Super Flow Liqui d Helium
     超流性液态中的孤立子研究
短句来源
     Helium Refrigeration in Spacecraft
     航天器上的制冷
短句来源
     Stimulated Raman scattering in liquid air
     液态空气的受激喇曼散射
短句来源
     Preparation and application of new liquid photoresist
     新型液态光致抗蚀剂
短句来源
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  liquid helium
An analysis is made of an experiment [3] on supersonic flow of a stream of air onto a surface cooled by liquid helium.
      
In liquid helium and glycerol, the Ps formation time is comparable to or even longer than the parapositronium lifetime.
      
Attainable Superheating of Liquid Helium-Oxygen Solutions
      
An Apparatus for Studying Condensed Impurity Systems in Liquid Helium
      
This indicates the discovery of a new highly porous form of ice in liquid helium-a water gel, the dispersed phase (solid frame) of which is formed by water clusters surrounded by a solidified helium layer; liquid helium serves as a dispersing medium.
      
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Electrons on the outer surface of liquid helium form a nearly ideal two-dimensional electron system. In general, an electron outside a solid or liquid is attracted to the surface by the electrostatic image force. For most insulators or semiconductors, a low energy electron can enter into the conduction band of the material and move on into the bulk. A few materials, including the liquids, helium, hydrogen, and neon, have negative electron affinities, and there is a barrier that prevents the electron from entering....

Electrons on the outer surface of liquid helium form a nearly ideal two-dimensional electron system. In general, an electron outside a solid or liquid is attracted to the surface by the electrostatic image force. For most insulators or semiconductors, a low energy electron can enter into the conduction band of the material and move on into the bulk. A few materials, including the liquids, helium, hydrogen, and neon, have negative electron affinities, and there is a barrier that prevents the electron from entering. In the case of liquid helium, the barrier is 1.0 eV. The long range attractive image potential and the short range repulsive barrier potential combine to form a potential well having a minimum outside the surface at a distance of about 76 A from the surface plane. This gives rise to a bound electron state. The electron can move freely parallel to the surface, but its motion perpendicular to the surface is restricted to the potential well. The properties of the surface electrons have been extensively studied theoretically and experimentally. The prototype experimental system for studying the properties of helium surface state electrons was developed at RCA Laboratories.

液氦外表面上的电子层构成一个近理想二维电子系统。通常,固体或液体外面的电子要受到静电镜象力的吸引作用。对于大多数绝缘体和半导体来说,低能电子可以进入该物质的导带而进入物质内部。包括液态的氦、氢和氖在内的少数物质具有负电子亲和力,而存在一个阻止电子进入物质内部的势垒。对于液氦,这个势垒为1.0eV。长程吸引电象势和短程排斥势垒结合在一起形成一个势阱。其极小值在表面平面外约76(?)距离处。这就导致了束缚电子态。电子可以平行表面自由运动,但垂直表面的运动则受到势阱的限制。表面电子的这些性质已在理论上和实验上得到广泛的研究。研究氦表面态电子性质的典型实验系统是在RCA实验室发展起来的。此束缚态的电象势和氢原子中电子的库仑吸引势在数学上是类似的,因此表面态电子具有和氢原子相似的基态和一系列激发态。其主要区别是介电体电象力比直接库仑吸引作用要弱得多,所以氢原子的束缚能为13.6eV,而表面态仅有0.65meV。表面态的类氢谱线已由射频辐射的测量从实验上证实。已被研究过的性质有:平行表面运动的电子迁移率,由于电容器的电子静电力引起的液面的变形,由于电子逸出表面引起的表面电子寿命,由于表面电子不是连续带电层而是不连续的点电...

液氦外表面上的电子层构成一个近理想二维电子系统。通常,固体或液体外面的电子要受到静电镜象力的吸引作用。对于大多数绝缘体和半导体来说,低能电子可以进入该物质的导带而进入物质内部。包括液态的氦、氢和氖在内的少数物质具有负电子亲和力,而存在一个阻止电子进入物质内部的势垒。对于液氦,这个势垒为1.0eV。长程吸引电象势和短程排斥势垒结合在一起形成一个势阱。其极小值在表面平面外约76(?)距离处。这就导致了束缚电子态。电子可以平行表面自由运动,但垂直表面的运动则受到势阱的限制。表面电子的这些性质已在理论上和实验上得到广泛的研究。研究氦表面态电子性质的典型实验系统是在RCA实验室发展起来的。此束缚态的电象势和氢原子中电子的库仑吸引势在数学上是类似的,因此表面态电子具有和氢原子相似的基态和一系列激发态。其主要区别是介电体电象力比直接库仑吸引作用要弱得多,所以氢原子的束缚能为13.6eV,而表面态仅有0.65meV。表面态的类氢谱线已由射频辐射的测量从实验上证实。已被研究过的性质有:平行表面运动的电子迁移率,由于电容器的电子静电力引起的液面的变形,由于电子逸出表面引起的表面电子寿命,由于表面电子不是连续带电层而是不连续的点电荷所引起的效应。在温度充分低时,电子间

This paper is intended to briefly describe the life of Heike Kamerlingh Onnes (1853-1926), a physicist of Holland, and his research of experimental physics. He was particularly noted for the research of properties of substances at very low temperature. He made great contributions in testing and verifying van der Waals' gas theory, improving and developing the experimental techniques of gas liquefaction, and especially in deeply understanding the physical properties of fluids and metals at very low temperature....

This paper is intended to briefly describe the life of Heike Kamerlingh Onnes (1853-1926), a physicist of Holland, and his research of experimental physics. He was particularly noted for the research of properties of substances at very low temperature. He made great contributions in testing and verifying van der Waals' gas theory, improving and developing the experimental techniques of gas liquefaction, and especially in deeply understanding the physical properties of fluids and metals at very low temperature. He was also the first person who successfully liquefied helium on the 10th of July, 1908, and discovered the phenomenon of superconductivity in 1911.

本文简要记述了荷兰物理学家海克·卡麦林·昂纳斯(HeikeKamerlingh Onnes,1853—1926)的生平和他的实验物理学研究。他尤以研究低温下物质的性质著称于世,在验证范德瓦尔斯气体理论、改进和发展气体液化的实验技术、特别是深入认识低温下的流体和金属的物理性质方面作出了重大贡献。1908年7月10日他最先成功地制备出液态氦,并且在1911年首次发现超导电性。

The variational fluid perturbation theory is used to calculate the single and doubleshock Hugoniot curves of liquid helium by means of a two-body potential function. It is foundthat the theoretical predictions are 30%~50%higher than the measurements at the same vol-ume.It shows that the effective potential of two atoms,which are at high densities and tempera-tures,is more lower than that of two isolated ones.The physical mechanism which probably causesthis unusual“soften”phenomena and its theoretical treatment...

The variational fluid perturbation theory is used to calculate the single and doubleshock Hugoniot curves of liquid helium by means of a two-body potential function. It is foundthat the theoretical predictions are 30%~50%higher than the measurements at the same vol-ume.It shows that the effective potential of two atoms,which are at high densities and tempera-tures,is more lower than that of two isolated ones.The physical mechanism which probably causesthis unusual“soften”phenomena and its theoretical treatment methods are discussed as well.

采用孤立氦原子两体排斥势和微扰变分液体理论计算了液态氦一次和二次冲击压缩曲线。与文献[4]实验结果比较发现,在相同体积下,理论计算压力偏高30%~50%,表明高温高密度状态下,氦原子间的等效排斥势比孤立氦原子两体排斥势低很多。文中分析讨论了引起液态氦在高压下异常“软化”现象的可能机制和理论处理方法。

 
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