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Renormalization group evaluation of the second virial coefficient of polydisperse polymer solutions 多分散聚合物溶液二次维里系数的重整化基团评价
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460230111500
S. Stepanow, E. Straube
2014 The second virial coefficient A2 for a mixture of two monodisperse polymers is studied by means of the renormalization group. It is found that the cross-term A12 has a finite limit if the segment number of one of the polymers tends to infinity. Such behaviour predicts a maximum of A2 in dependence on the relative composition of the polymers. The maximum resulting from our firstorder RG-calculation lies outside the molecular weight ratio investigated so far experimentally. J. Physique Lett. 46 (1985) L-1115 L-1122 ler DECEMBRE 1985, Classification Physics Abstracts 36.20 61.40K 82.70
2014利用重整化基团研究了两种单分散聚合物混合物的二次维里系数A2。发现交叉项A12有一个有限的极限,当其中一个聚合物的段数趋于无穷大时。这种行为预测A2的最大依赖于聚合物的相对组成。从我们的第一个rg计算得到的最大值超出了迄今为止实验研究的分子量比。J.体质快报46 (1985)L-1115 L-1122, 1985年12月,分类物理文摘36.20 61.40K 82.70
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引用次数: 1
Time scaling of the ageing process in spin-glasses : a study in CsNiFeF6 自旋玻璃老化过程的时间尺度:CsNiFeF6的研究
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460230110100
M. Ocio, M. Alba, J. Hammann
The ageing properties of the time decay of the thermoremanent magnetization (TRM) in CsNiFeF 6 are analysed on the basis of a phenomenological theory of times scaling as yet used in the case of the mechanical properties of glassy polymers. We find that the time decay law takes the form of the product of a stretched exponential by a power law Analyse des proprietes de vieillissement de la decroissance de l'aimantation thermoremanente en fonction du temps a partir d'une theorie phenomenologique d'echelle, deja utilisee pour les proprietes mecaniques des polymeres vitraux
基于时间标度的现象学理论,分析了csnifef6中热磁化(TRM)时间衰减的老化特性,该理论目前还用于研究玻璃聚合物的机械性能。我们发现,时间衰减律的形式是指数与幂律的乘积,即时间衰减律的形式是时间衰减律的形式,即时间衰减律的形式是时间衰减律的形式,即时间衰减律的形式是时间衰减律的形式
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引用次数: 29
The electrostatic energy of a lattice of point charges 点电荷晶格的静电能
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460240114300
J. Olives
The limit electrostatic energy per cell E of ionic lattice of point charges is defined as the limit value of the energy of a finite crystal divided by its number of cells (when this number tends towards+∞). The explicit value of E is calculated and related to the Ewald energy. This energy E depends on the sequence of the increasing finite crystals (more precisely, on the sequence of the increasing finite sets of ions). In other words, and briefly: E is a volumic energy which depends on the surface L'energie electrostatique limite par paille d'un reseau ionique est definie comme la valeur limite de l'energie d'un cristal fini divisee par son nombre de mailles. Calcul de sa valeur que l'on relie a l'energie d'Ewald
点电荷离子晶格的每单元极限静电能量E定义为有限晶体能量的极限值除以其单元数(当该数趋于+∞时)。计算出E的显式值,并与埃瓦尔德能相关联。能量E取决于不断增加的有限晶体的序列(更准确地说,取决于不断增加的有限离子的序列)。换句话说,简单地说,E是一种体积能量,它取决于表面的能量,静电的极限,晶体的极限,晶体的极限,晶体的极限,晶体的极限。计算de sa valeur que l'on relie和l' energy d'Ewald
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引用次数: 3
Multiple scale structure of non wetting fluid invasion fronts in 3D model porous media 三维模型多孔介质中非润湿流体侵入前沿的多尺度结构
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460240116300
É. Clément, C. Baudet, J. Hulin
We report experimental measurements on the structure of invasion fronts obtained by slow vertical injection of liquid, non wetting, Wood metal into non consolidated crushed glass. The geometry of plane cuts of the invasion front both parallel and perpendicular to the flow direction is analysed. The structure of perpendicular cuts is self similar in a length scale range of 1 to 20 with a fractal dimension 1.65. Saturation profiles measured from parallel cuts are in qualitative agreement with invasion percolation models. Possible theoretical predictions for the geometry of horizontal cuts are discussed Mesures de la structure de fronts d'invasion obtenus par une injection verticale lente de metal de Wood non mouillant dans un massif de verre pile non consolide. On analyse la geometrie de coupes du front d'invasion perpendiculaires et paralleles a la direction d'ecoulement. Comparaison des profils des coupes paralleles avec les modeles de percolation
我们报告了通过缓慢垂直注入液体,非润湿,木质金属到非固结破碎玻璃中获得的入侵前沿结构的实验测量。分析了平行于流动方向和垂直于流动方向的侵流锋面切割的几何形状。垂直切口的结构在1 ~ 20的长度尺度范围内具有自相似性,分形维数为1.65。从平行切面测得的饱和度曲线与侵入渗流模型在定性上一致。讨论了对水平切割几何形状可能的理论预测措施,即结构、锋面、侵入、倾斜、注入、金属、木材、非移动、非块状、verre桩、非固结。分析了垂直方向和平行方向的几何耦合。两种不同模型的剖面、平行剖面的比较
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引用次数: 18
A new way to include the grain shape in texture simulations with the Taylor model 利用Taylor模型在纹理模拟中加入纹理形状的新方法
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460230110900
H. Bunge, F. Wagner, P. Houtte
The use of the Hall-Petch relation in texture simulations with the Taylor-Bishop-Hill model is proposed as a mean to take into account grain shape effect. The results are compared with those obtained with the usual and relaxed constraint Taylor model for a simple texture and the consequences for the anisotropy coefficient are investigated On propose d'utiliser la relation de Hall-Petch dans les simulations de texture a l'aide du modele de Taylor-Bishop-Hill pour prendre en compte la forme des grains. Comparaison des resultats avec ceux du modele de Taylor classique ou relaxe dans le cas d'une texture simple; consequences pour le coefficient d'anisotropie
提出了在Taylor-Bishop-Hill模型的纹理模拟中使用Hall-Petch关系作为考虑纹理形状效应的手段。对简单纹理的模拟结果与通常约束Taylor模型和放宽约束Taylor模型的结果进行了比较,并探讨了各向异性系数的影响。对比结果显示:经典的经典、松弛的纹理和简单的纹理;结果为各向异性系数
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引用次数: 29
High resolution measurement of fragment mass-charge-kinetic energy correlations in the cold fragmentation region of thermal fission of 235U 235U热裂变冷破碎区碎片质量-电荷-动能相关的高分辨率测量
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460230109500
C. Signarbieux, G. Simon, J. Trochon, F. Brisard
; fragments keV, la séparation des masses est et, séparation des charges est Une discussion de l’évolution de la distribution des charges en fonction de cinétique totale des fragments pour de masses 132/104. Abstract. 2014 The performance of a back-to-back gridded ionization chamber containing an extremely thin fissile target has been investigated for studying the cold fragmentation phenomenon : primary fragment kinetic energy is measured with a resolution much better than 300 keV; mass separation is total and for each mass, a good charge separation is obtained. The evolution of the charge distribution as a function of the fragments’ total kinetic energy is discussed for the mass-ratio 132/104.
;残片keV,残片质量est,残片质量est,残片质量est,残片质量est,残片质量est,残片质量est,残片质量est,残片质量est,残片质量est摘要:2014年,为了研究极薄裂变靶的冷破片现象,研究了背对背网格电离室的性能:测量了一次破片动能,分辨率远高于300 keV;质量分离是完全的,对于每一个质量,得到一个很好的电荷分离。讨论了质量比为132/104时碎片总动能随电荷分布的变化规律。
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引用次数: 8
Helimagnetic structure in diluted Y-Gd alloys 稀释Y-Gd合金的磁结构
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460230113900
P. Brown, R. Caudron, A. Fert, D. Givord, P. Pureur
Neutron scattering studies on Y-Gd 2 and 3 at. % single crystals show a helimagnetic ordering to occur below Neel temperatures of 7 and 12 K respectively. The same value of the propagation vector [0, 0, 0.28 c*] is obtained for both samples. The Gd moments lie in the basal plane of the hexagonal structure. No contribution from the conduction electrons to the magnetic amplitudes is evidenced in addition to the 4f contribution. The Gd moment at low temperature is about 7 μg. The temperature dependence of the magnetic satellite intensity follows that predicted by a Brillouin function L'etude par diffraction de neutrons de Y-2% Gd et Y-3% Gd monocristallins revele un ordre helimagnetique au-dessous du point de Neel. On obtient une meme valeur du vecteur de propagation pour les deux echantillons. Les moments de Gd sont dans le plan de base de la structure hexagonale. Aucune contribution des electrons de conduction aux amplitudes magnetiques n'apparait superposee a la contribution 4f
Y-Gd 2和3at的中子散射研究。%的单晶分别在7和12 K的尼尔温度下显示出helmagnetic有序。两个样本的传播矢量[0,0,0.28 c*]的值相同。Gd矩位于六边形结构的基面上。除了4f的贡献外,没有证据表明传导电子对磁幅有贡献。低温下Gd矩约为7 μg。磁卫星强度的温度依赖性遵循布里渊函数对Y-2% Gd和Y-3% Gd单晶中子衍射的纬度预测。对一个模因值的感知,在矢量传播的过程中,有两个机制。Les moments de Gd sont dans le plan de base de structure六边形。电子对传导的贡献为振幅、磁场对器件叠加的贡献为4f
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引用次数: 9
Configuration space analysis for fully frustrated vector spins 完全受挫矢量自旋的构形空间分析
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460230108700
P. Lallemand, H. Diep, A. Ghazali, G. Toulouse
Classical vector spins, on the sites of a three-dimensional simple cubic lattice, interacting via a periodic fully frustrated array of exchange interactions, may exhibit an interesting manifold of ground state configurations. In particular, for Heisenberg spins, the manifold has dimension 5, with two continuous degeneracy parameters, in addition to global rotation angles. A configuration space analysis, including pair and triangle overlap statistics, has been performed for this test model Des spins vectoriels classiques sur les sites d'un reseau cubique simple 3D, avec une distribution periodique completement frustree d'interaction d'echange, peuvent posseder une interessante variete de configuration de base. Pour des spins de Heisenberg, la variete a la dimension 5, avec deux parametres de degenerescence continus, en plus des angles de rotation globale. Analyse d'espace de configurations en incluant l'etude statistique des recouvrements pour les paires et les triangles
经典的矢量自旋,在三维简单立方晶格的位置上,通过周期性的完全受挫的交换相互作用阵列相互作用,可能会表现出有趣的基态构型的流形。特别地,对于海森堡自旋,流形具有5维,除了全局旋转角外,还具有两个连续的简并参数。对该测试模型进行了组态空间分析,包括对和三角形重叠统计,包括自旋矢量、经典点、简单三维、平均分布、周期互补树、相互作用、交换、随机占位等。海森堡的旋转,变化,维度5,平均双参数,简并连续,全局旋转角。分析空间结构,包括纵向统计特征和三角形特征
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引用次数: 10
AC electric field induced flow and helix unwinding in focal conic texture of smectic C* liquid crystal 近晶C*液晶焦锥织构中交流电场诱导的流动和螺旋解绕
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460240117700
B. Labroo, V. Razdan, D. Parmar, G. Durand
A thin (∼10 μm) focal conic texture of DOBAMBC in its SmC * phase is submitted to an AC electric field. Above a field threshold, a DC plug flow of the texture normal to the layers is observed. It always originates from the focus of the ellipses towards their centre and extends to the entire focal domain. At higher field, the associated viscous shear unwinds the helical texture. The flow thresholds is explained by the build up at the focus of a DC electric pressure, from the action of the AC field on AC space charges, generated by conductivity anisotropy Etude sur le DOBAMBC. Observation d'un ecoulement permanent bouchon au-dela d'un certain seuil
在交流电场作用下,DOBAMBC在其SmC *相中形成薄(~ 10 μm)的焦锥形织构。在场阈值以上,观察到纹理垂直于层的直流插头流。它总是从椭圆对中心的焦点开始,并延伸到整个焦点区域。在较高的电场下,相关的粘性剪切会解开螺旋结构。流动阈值的解释是,由电导率各向异性Etude sur le DOBAMBC产生的交流场对交流空间电荷的作用产生的直流电压力的焦点。观察法规定,在某一特定场合,要有永久的自由
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引用次数: 5
On the effect of small ions in the dynamics of polyelectrolyte solutions 小离子对聚电解质溶液动力学的影响
Pub Date : 1985-12-01 DOI: 10.1051/JPHYSLET:0198500460240118300
L. Belloni, M. Drifford
Formules exprimant le coefficient de diffusion mutuelle des polyions en fonction des concentrations de polyelectrolyte et de sel ajoute
将聚离子相互扩散系数表示为聚电解质和盐浓度的函数的公式
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引用次数: 23
期刊
Journal De Physique Lettres
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