Relation between Principal Peak Height, Position and Width of Structure Factor in Dense Monatomic Liquids

The modification of liquid metal by electric pulse (EP, EPM) is a novel method for grain refinement. In this study, based on the reported structural heredity of EP-modified liquid aluminium, the structure tests of EP-modified liquid aluminium with different technique parameters were conducted by using high temperature X-ray diffractometer. The results show that the quantitative structure changes of EP-modified liquid aluminium have a close relationship with the modifying time and modifying temperature. The decrease of modifying time could result in an obvious weaker principal peak in structure factor curve compared with the optimal EP technique parameters, but a slight increase of coordination number (Ns), correlation radius (rc) and average atom number per cluster (Nat) is still observed under this condition. These facts indicate that the EP-modified liquid aluminum could gain an increasing order degree, and thus have an advantage during the formation of a stable nucleus, eventually leading to a grain-refining solidification structure. On the other hand, the structure factor curve of EP-modified liquid aluminum at the high modifying temperature of 850°C tends to be overlapped with that of the unmodified during the principal peak range. In this case, the competition result between the EP strengthening effect and the destruction of superheating would determine the final structure of EP-modified liquid aluminum.

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DYNAMICAL STRUCTURE FACTOR FOR s - f MODEL WITH SPIN-PHONON INTERACTION

International Journal of Modern Physics B ◽

10.1142/s0217979296001264 ◽

1996 ◽

Vol 10 (22) ◽

pp. 2797-2809

Author(s):

J. M. WESSELINOWA ◽

A. T. APOSTOLOV

Keyword(s):

Spin Wave ◽

Wave Energy ◽

Structure Factor ◽

Peak Height ◽

Function Technique ◽

Ferromagnetic Semiconductors ◽

Dynamical Structure ◽

Dynamical Structure Factor ◽

Phonon Interaction ◽

First Time

A Green's function technique is used to study the effects of spin–phonon interaction in ferromagnetic semiconductors based on the s - f model. The spin wave energy and the damping are evaluated for the first time beyond the RPA and numerically calculated. They increase with increasing spin–phonon interaction. The dependence of the dynamical structure factor on temperature and on spin–phonon interaction is discussed. At fixed T with increasing spin–phonon interaction the peak height decreases, the half-width increases, whereas the peak shifts to higher energy values.

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The Partial Structure Factor of Sulphur in Liquid CS2 by Combining X -ray and Neutron Diffraction Results

Zeitschrift für Naturforschung A ◽

10.1515/zna-1977-0810 ◽

1977 ◽

Vol 32 (8) ◽

pp. 863-865 ◽

Cited By ~ 3

Author(s):

B. R. Orton

Keyword(s):

Solid State ◽

Neutron Diffraction ◽

Structure Factor ◽

Theoretical Calculations ◽

Peak Height ◽

Main Peak ◽

State Structure ◽

Partial Structure ◽

X Ray ◽

Partial Structure Factor

Abstract The partial structure factor for sulphur in liquid CS2 at 20 °C has been computed by combining published x-ray and neutron diffraction results. Assuming that there are no correlations of molecular orientations, it is found that the main peak height of this sulphur-sulphur partial structure factor is smaller than that for carbon-carbon. This result is discussed in relation to the solid state structure and recent theoretical calculations.

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Valence electron spectroscopy of inhomogeneous media

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100130389 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1150-1151

Author(s):

A. Howie ◽

D.W. McComb

Keyword(s):

Specific Gravity ◽

Loss Function ◽

Electron Spectroscopy ◽

Valence Electron ◽

Peak Height ◽

Loss Functions ◽

Loss Peak ◽

High Energies ◽

Valence Electron Density ◽

Electron Microscopist

The bulk loss function Im(-l/ε (ω)), a well established tool for the interpretation of valence loss spectra, is being progressively adapted to the wide variety of inhomogeneous samples of interest to the electron microscopist. Proportionality between n, the local valence electron density, and ε-1 (Sellmeyer's equation) has sometimes been assumed but may not be valid even in homogeneous samples. Figs. 1 and 2 show the experimentally measured bulk loss functions for three pure silicates of different specific gravity ρ - quartz (ρ = 2.66), coesite (ρ = 2.93) and a zeolite (ρ = 1.79). Clearly, despite the substantial differences in density, the shift of the prominent loss peak is very small and far less than that predicted by scaling e for quartz with Sellmeyer's equation or even the somewhat smaller shift given by the Clausius-Mossotti (CM) relation which assumes proportionality between n (or ρ in this case) and (ε - 1)/(ε + 2). Both theories overestimate the rise in the peak height for coesite and underestimate the increase at high energies.

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Experimental structure factor of solutions of randomly branched polymers

Journal de Physique ◽

10.1051/jphys:0199000510200237300 ◽

1990 ◽

Vol 51 (20) ◽

pp. 2373-2385 ◽

Cited By ~ 7

Author(s):

F. Schosseler ◽

M. Daoud ◽

L. Leibler

Keyword(s):

Structure Factor ◽

Branched Polymers ◽

Experimental Structure

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RESISTIVITY OF LIQUID Ga BETWEEN 303 K AND 573 K FROM STRUCTURE FACTOR MEASURENENTS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1980867 ◽

1980 ◽

Vol 41 (C8) ◽

pp. C8-262-C8-265 ◽

Cited By ~ 1

Author(s):

M. C. Bellissent-Funel ◽

R. Bellissent ◽

G. Tourand

Keyword(s):

Structure Factor

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THERMAL DEPENDENCE OF THE STRUCTURE FACTOR IN AMORPHOUS SOLIDS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1985841 ◽

1985 ◽

Vol 46 (C8) ◽

pp. C8-281-C8-286 ◽

Cited By ~ 1

Author(s):

C. Tête ◽

D. Boumazouza ◽

G. Marchal ◽

Ph. Mangin ◽

J. Bouillot ◽

...

Keyword(s):

Structure Factor ◽

Amorphous Solids ◽

Thermal Dependence

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Thrombin generation in paediatric patients with congenital heart disease

Hämostaseologie ◽

10.1055/s-0037-1617119 ◽

2008 ◽

Vol 28 (S 01) ◽

pp. S61-S66 ◽

Cited By ~ 1

Author(s):

G. Cvirn ◽

A. Rosenkranz ◽

B. Leschnik ◽

W. Raith ◽

W. Muntean ◽

...

Keyword(s):

Congenital Heart Disease ◽

Heart Disease ◽

Negative Correlation ◽

Congenital Heart ◽

Thrombin Generation ◽

Significant Negative Correlation ◽

Peak Height ◽

Global Test ◽

Paediatric Patients ◽

Age Range

SummaryThrombin generation was studied in paediatric patients with congenital heart disease (CHD) undergoing cardiac surgery using the calibrated automated thrombography (CAT) in terms of the lag time until the onset of thrombin formation, time to thrombin peak maximum (TTP), endogenous thrombin potential (ETP), and thrombin peak height. The suitability to determine the coagulation status of these patients was investigated. Patients, material, methods: CAT data of 40 patients with CHD (age range from newborn to 18 years) were compared to data using standard coagulation parameters such as prothrombin (FII), antithrombin (AT), tissue factor pathway inhibitor (TFPI), prothrombin fragment 1.2 (F 1.2), thrombin-antithrombin (TAT), activated partial thromboplastin time (aPTT), and prothrombin time (PT). Results: A significant positive correlation was seen between ETP and FII (p < 0.01; r = 0.369), as well as between peak height and F II (p < 0.01; r = 0.483). A significant negative correlation was seen between ETP and TFPI values (p < 0.05; r = –0.225) while no significant correlation was seen between peak height and TFPI. A significant negative correlation was seen between F 1.2 generation and ETP (p < 0.05; r = –0.254) and between F 1.2 generation and peak height (p < 0.05; r = –0.236). No correlation was seen between AT and ETP or peak. Conclusions: CAT is a good global test reflecting procoagulatory and inhibitory factors of the haemostatic system in paediatric patients with CHD.

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