Measurement of Temperatures in Flames of Complex Structure by Resonance Line Radiation. III. From Absolute Intensity Measurements at High Resolution

1954 ◽  
Vol 25 (12) ◽  
pp. 1531-1537 ◽  
Author(s):  
F. P. Bundy ◽  
H. M. Strong
Keyword(s):  
High Resolution ◽  
Resonance Line ◽  
Complex Structure ◽  
Absolute Intensity ◽  
Line Radiation ◽  
Intensity Measurements

Computer processing of high-resolution images of periodic specimens

1986 ◽  
Vol 44 ◽  
pp. 2-5
Author(s):  
W. Chiu ◽  
M.F. Schmid ◽  
T.-W. Jeng
Keyword(s):  
High Resolution ◽  
Fourier Transforms ◽  
Complex Structure ◽  
Distribution Functions ◽  
Multiple Image ◽  
Cryo Electron Microscopy ◽  
Structure Factors ◽  
Unit Cells ◽  
High Resolution Images ◽  
Phase Probability Distribution

Cryo-electron microscopy has been developed to the point where one can image thin protein crystals to 3.5 Å resolution. In our study of the crotoxin complex crystal, we can confirm this structural resolution from optical diffractograms of the low dose images. To retrieve high resolution phases from images, we have to include as many unit cells as possible in order to detect the weak signals in the Fourier transforms of the image. Hayward and Stroud proposed to superimpose multiple image areas by combining phase probability distribution functions for each reflection. The reliability of their phase determination was evaluated in terms of a crystallographic “figure of merit”. Grant and co-workers used a different procedure to enhance the signals from multiple image areas by vector summation of the complex structure factors in reciprocal space.

Quantitative Messung des Elektronenaffinitätskontinuums von Chlor mit dem Stoßwellenrohr / Quantitative Measurement Of The Electron Affinity Continuum Of Chlorine With The Shock Tube

1972 ◽  
Vol 27 (6) ◽  
pp. 989-995 ◽  
Author(s):  
G. Pletsch
Keyword(s):  
Shock Tube ◽  
Cross Section ◽  
Electron Affinity ◽  
Quantitative Measurement ◽  
Wavelength Region ◽  
Electron Attachment ◽  
Absolute Intensity ◽  
Intensity Measurements ◽  
Long Wave ◽  
Chlorine Ion

Abstract Using a mixture of chlorine with krypton the continuous spectrum resulting from electron attachment to chlorine atoms is produced in a shock tube. Absolute intensity measurements lead to the detachment cross-section of the negative chlorine ion in the wavelength region between the long-wave threshold at 3434 Å and 2700 Å. The cross-section is compared with known experimental and theoretical values.

scholarly journals Peculiar J-type Carbon Stars and Li

2000 ◽  
Vol 198 ◽  
pp. 506-507
Author(s):  
S. Lorenz-Martins ◽  
N. A. Drake
Keyword(s):  
High Resolution ◽  
Spectral Region ◽  
Resonance Line ◽  
Spectral Synthesis ◽  
Synthesis Method ◽  
Isotopic Ratios ◽  
Carbon Stars ◽  
Carbon Isotopic ◽  
Carbon Abundance ◽  
Extended Range

We determined the carbon and lithium abundances and carbon isotopic ratios for 4 peculiar carbon stars by means of spectral synthesis method. Li abundances were derived using Li resonance line at λ6707.8 Â. For carbon abundance determinations we used the lines of the red system of CN molecule. Spectral region of λλ7994 — 8030 Â containing the lines of molecules 12CN and 13CN was used also for 12C/13C ratio measuring. The high-resolution spectra were obtained on the 1.52m telescope of ESO with the Fiber-fed Extended Range Optical Spectrograph (FEROS). These observations were obtained under the agreement between the CNPq-Observatório Nacional, Brazil, and ESO.

scholarly journals Photonic superdiffusive motion in resonance line radiation trapping Partial frequency redistribution effects

2007 ◽  
Vol 126 (15) ◽  
pp. 154505 ◽  
Author(s):  
A. R. Alves-Pereira ◽  
E. J. Nunes-Pereira ◽  
J. M. G. Martinho ◽  
M. N. Berberan-Santos
Keyword(s):  
Resonance Line ◽  
Line Radiation ◽  
Partial Frequency ◽  
Frequency Redistribution ◽  
Radiation Trapping ◽  
Partial Frequency Redistribution
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