Properties of illuminated iodine solutions. Part II.—The negative absorption effect in benzene and other solvents

1936 ◽  
Vol 32 (0) ◽  
pp. 816-823 ◽  
Author(s):  
E. Rabinowitch ◽  
W. C. Wood
Keyword(s):  
Absorption Effect ◽  
Negative Absorption

An Evaluation of the Rasberry-Heinrich Model for the Analysis of Silicate Rocks

1982 ◽  
Vol 36 (5) ◽  
pp. 520-523 ◽  
Author(s):  
James R. Lindsay ◽  
Harry J. Rose ◽  
Richard R. Larson
Keyword(s):  
Binary Mixtures ◽  
Binary Systems ◽  
Absorption Effect ◽  
Negative Absorption ◽  
Fe And Mn ◽  
Silicate Rocks ◽  
Secondary Fluorescence

The Rasberry-Heinrich model for correcting for absorption and secondary fluorescence effects is evaluated in the analysis of silicate rocks. The interelement effect of binary mixtures of the oxides of Na, Mg, Al, Si, K, Ca, Ti, Fe, and Mn is studied in a 1:11 fusion mixture with Li2B4O7. Two binary systems are expected to exhibit secondary fluorescence effects and are reported in detail. The combination Fe2O3/TiO2 shows a small secondary fluorescence, whereas the Al2O3/SiO2 binary shows an absorption effect. The latter effect is attributed to the large absorption effect due to oxygen. The secondary fluorescence of its Fe2O3/TiO2 system in a diluted matrix of Li2B4O7 acts like a negative absorption rather than secondary fluorescence as described by the Rasberry-Heinrich model.

The Negative Absorption of Radiation

Nature ◽  
1928 ◽  
Vol 122 (3062) ◽  
pp. 12-13 ◽  
Author(s):  
C. V. RAMAN ◽  
K. S. KRISHNAN
Keyword(s):  
Negative Absorption

The Electrically Controlled Birefringence Measurement Influence of Liquid Crystal Caused by Absorption Effect in Infrared Region

2014 ◽  
Vol 875-877 ◽  
pp. 467-471
Author(s):  
Ning Wang ◽  
Xiao Xia Li
Keyword(s):  
Liquid Crystal ◽  
Absorption Coefficient ◽  
Approximate Method ◽  
Nematic Liquid Crystal ◽  
Infrared Region ◽  
Interference Method ◽  
Absorption Coefficients ◽  
Absorption Effect ◽  
Ordinary Light

The electrically controlled birefringence of nematic liquid crystal BL-009 was measured by polarized interference method. The influence of LC absorption effect, the birefringence variation, is discussed in this paper. The experiments results showed the influence to birefringence is big in infrared region. Not only the birefringence value is greatly different with that of unconsidering absorption effect, but also the gradient changing of birefringence curves is obvious. Furthermore, the electrically controlled birefringences of two conditions are compared when the absorption coefficients of ordinary light and the extraordinary light are nearly same and greatly different. The analysis demonstrated the approximate method of absorption coefficient is feasible.

Anomalous electron absorption effects in metal foils: theory and comparison with experiment

1962 ◽  
Vol 269 (1336) ◽  
pp. 80-103 ◽  
Keyword(s):  
Fourier Coefficients ◽  
Stacking Faults ◽  
Formal Theory ◽  
Dynamical Theory ◽  
Anomalous Absorption ◽  
Physical Explanation ◽  
Absorption Effect ◽  
Metal Foils ◽  
Comparison With Experiment ◽  
Transmission Electron

The two-beam dynamical theory of electron diffraction in absorbing crystals has been applied to explain features of bend and thickness extinction contours and of images of stacking faults observed on transmission electron micrographs of metal foils. Inelastic scattering processes affect the intensities of the elastically scattered waves and give rise to 4 anomalous ’ transmission (Borrmann) effects. The formal theory takes account of these effects phenomenologically by the use of a complex lattice potential but ignores the contribution of the inelastically scattered electrons to the image. In the theory absorption is described by certain parameters ξ' 0 and ξ' g with dimensions of length. These parameters are determined by Fourier coefficients of the imaginary part of the potential in the same manner as the extinction distance ξ g is determined by the Fourier coefficient of the real part. A simple physical explanation of the ‘anomalous’ absorption effect is developed in terms of the two crystal wave fields. This explanation is particularly helpful in understanding details of bend and thickness contours and of images of stacking faults. The theory is at present phenomenological because the detailed mechanism of the absorption process is not understood. Nevertheless, comparison of the theory with observations enables the absorption parameters to be roughly estimated.

Study on Vibration Absorption of New-Energy Autos Batteries’ Cooling Fan

2012 ◽  
Vol 502 ◽  
pp. 441-445
Author(s):  
Jin Bo Ren ◽  
Xiang Zhang ◽  
Bing Le Hu
Keyword(s):  
Experimental Comparison ◽  
Absorption Effect ◽  
Vibration Absorption ◽  
Cooling Fan ◽  
New Energy ◽  
Assembly Technique

This paper mainly talks about the structure of new-energy autos batteries’ cooling fan. It gives the reasons for vibration in theory. It also improved the structure of damping pads for vibration absorption by comparing vibration absorption effect of damping pads made of two different kinds of material. In the end, the better-effect structure and material for vibration absorption is selected after the experimental comparison. In addition, the assembly technique is advanced for fan, which left a notable alleviation of vibration.

scholarly journals Re-Absorption Effect Modeling for Dual-Layer Phosphor Package of White LEDs

2021 ◽  
Vol 13 (4) ◽  
pp. 1-10
Author(s):  
Ching-Cherng Sun ◽  
Yi-Ning Peng ◽  
Yu-Yu Chang ◽  
He-Xiang Chen ◽  
Tsung-Xian Lee
Keyword(s):  
Absorption Effect ◽  
White Leds
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