scholarly journals The interdiffusion in liquid alloys of alkali metals with lead

2021 ◽  
Vol 2119 (1) ◽  
pp. 012142
Author(s):  
R N Abdullaev ◽  
R A Khairulin ◽  
S V Stankus
Keyword(s):  
Short Range ◽  
Alkali Metals ◽  
Gamma Ray ◽  
Liquid Alloys ◽  
Short Range Ordering ◽  
Concentration Dependences ◽  
Lead Alloys ◽  
Liquid Cesium ◽  
Liquid Systems ◽  
Gamma Ray Attenuation

Abstract The mutual diffusion in liquid cesium-lead alloys containing from 20 to 70 at.% Pb is investigated by a gamma-ray attenuation technique. The obtained data are compared with the results of similar studies for Li-Pb, Na-Pb, and K-Pb melts, carried out by us earlier. The concentration dependences of the interdiffusion coefficient for alkali-lead liquid systems demonstrate pronounced maxima in the vicinity of 20 or 50 at.% Pb. These phenomena confirm a tendency for chemical short-range ordering in liquid alloys.

scholarly journals Gamma-Ray Attenuation to Evaluate Soil Porosity: An Analysis of Methods

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Luiz F. Pires ◽  
André B. Pereira
Keyword(s):  
Gamma Ray ◽  
Particle Density ◽  
Pore Space ◽  
Physical Property ◽  
Soil Bulk Density ◽  
Soil Porosity ◽  
Porous System ◽  
Soil Pore Space ◽  
Gamma Ray Attenuation ◽  
Dry Soil

Soil porosity (ϕ) is of a great deal for environmental studies due to the fact that water infiltrates and suffers redistribution in the soil pore space. Many physical and biochemical processes related to environmental quality occur in the soil porous system. Representative determinations ofϕare necessary due to the importance of this physical property in several fields of natural sciences. In the current work, two methods to evaluateϕwere analyzed by means of gamma-ray attenuation technique. The first method uses the soil attenuation approach through dry soil and saturated samples, whereas the second one utilizes the same approach but taking into account dry soil samples to assess soil bulk density and soil particle density to determineϕ. The results obtained point out a good correlation between both methods. However, whenϕis obtained through soil water content at saturation and a 4 mm collimator is used to collimate the gamma-ray beam the first method also shows good correlations with the traditional one.

Emulation of short-range ordering within the Compound Energy Formalism: Application to the calcite-magnesite solid solution

Calphad ◽  
2019 ◽  
Vol 64 ◽  
pp. 115-125 ◽  
Author(s):  
Xin Liu ◽  
Victor L. Vinograd ◽  
Sergii Nichenko ◽  
Dmitrii A. Kulik ◽  
Xiancai Lu ◽  
...  
Keyword(s):  
Solid Solution ◽  
Short Range ◽  
Compound Energy Formalism ◽  
Short Range Ordering

Gamma-ray attenuation behaviors of hematite doped polymer composites

2020 ◽  
Vol 129 ◽  
pp. 103504 ◽  
Author(s):  
Mehmet Fatih Turhan ◽  
Ferdi Akman ◽  
Hasan Polat ◽  
Mustafa Recep Kaçal ◽  
İskender Demirkol
Keyword(s):  
Polymer Composites ◽  
Gamma Ray ◽  
Gamma Ray Attenuation ◽  
Doped Polymer

Measurement of pulmonary edema in intact dogs by transthoracic gamma-ray attenuation

1979 ◽  
Vol 47 (6) ◽  
pp. 1228-1233 ◽  
Author(s):  
D. S. Simon ◽  
J. F. Murray ◽  
N. C. Staub
Keyword(s):  
Pulmonary Edema ◽  
Time Course ◽  
Gamma Ray ◽  
High Sensitivity ◽  
Lung Edema ◽  
Lung Water ◽  
Vascular Congestion ◽  
Isolated Lung ◽  
Wide Range ◽  
Gamma Ray Attenuation

We evaluated the attenuation of the 122 keV gamma ray of cobalt-57 across the thorax of anesthetized dogs as a method for following the time course of lung water changes in acute pulmonary edema induced by either increased microvascular permeability or increased microvascular hydrostatic pressure. The gamma rays traversed the thorax centered on the seventh rib laterally where the lung mass in the beam path was greatest. Calibration measurements in isolated lung lobes demonstrated the high sensitivity and inherent accuracy of the method over a wide range of lung water contents. In control dogs reproducibility averaged +/-3%. Increased permeability edema led to large rapid increases in the transthoracic gamma ray attenuation (TGA), while increased pressure caused an immediate, modest increase in TGA (vascular congestion) followed by a slow further increase over 2 h. There was a fairly good correlation between the increase in extravascular lung water and the change in TGA. The method is simple, safe, and noninvasive and appears to be useful for following the time course of lung water accumulation in generalized lung edema in anesthetized animals.

Short-range-ordering in the Ba2+ ion distribution in Ba2+ β''-alumina at 295 K

1984 ◽  
Vol 40 (3) ◽  
pp. 208-213 ◽  
Author(s):  
J. O. Thomas ◽  
M. Aldén ◽  
G. J. McIntyre ◽  
G. C. Farrington
Keyword(s):  
Short Range ◽  
Ion Distribution ◽  
Short Range Ordering
Sign in / Sign up

Export Citation Format

Share Document