STRUCTURAL STUDIES OF NANOMATERIALS BY THE RADIAL ELECTRON DENSITY DISTRIBUTION METHOD WITH THE USE OF SYNCHROTRON RADIATION IN TRANSMISSION MODE

2015 ◽  
Vol 56 (6) ◽  
Keyword(s):  
Synchrotron Radiation ◽  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Transmission Mode ◽  
Structural Studies ◽  
Distribution Method ◽  
Radial Electron Density Distribution

9.16. A sub-parsec accretion disk in NGC 4261

1998 ◽  
Vol 184 ◽  
pp. 413-414
Author(s):  
D.L. Jones ◽  
A.E. Wehrle
Keyword(s):  
Density Distribution ◽  
Radio Source ◽  
Electron Density ◽  
Accretion Disk ◽  
Electron Density Distribution ◽  
Angular Resolution ◽  
Absorption Feature ◽  
Nuclear Region ◽  
Narrow Gap ◽  
Radial Electron Density Distribution

We observed the nuclear region of NGC 4261 (3C270) with the VLBA to determine the morphology of the central radio source on parsec scales. Our highest angular resolution image at 8.4 GHz shows a very narrow gap in emission just east of the radio core (on the counterjet side), which we interpret as an absorption feature caused by a small, dense inner accretion disk whose width is less than 0.1 parsec. If the inclination of this inner disk is close to that of the much larger-scale disk imaged by HST, it becomes optically thin to 8.4 GHz radiation at a deprojected radius of about 0.8 pc. September 1997 VLBA observations at higher frequencies should allow us to determine the radial electron density distribution of the inner disk.

A contribution of radial electron density distribution measurements to the study of PTFE-Carbon

Carbon ◽  
1981 ◽  
Vol 19 (6) ◽  
pp. 413-419 ◽  
Author(s):  
L. Červinka ◽  
F.P. Dousek ◽  
J. Jansta ◽  
H.G. Neumann ◽  
H. Steil
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Radial Electron Density Distribution

The Electron Density Distribution in Be Metal Obtained from Synchrotron-Radiation Powder Data by the Maximum-Entropy Method

1993 ◽  
Vol 48 (1-2) ◽  
pp. 75-80 ◽  
Author(s):  
Masaki Takata ◽  
Yoshiki Kubota ◽  
Makoto Sakata
Keyword(s):  
Synchrotron Radiation ◽  
Density Distribution ◽  
Maximum Entropy ◽  
Electron Density ◽  
Electron Density Distribution ◽  
Maximum Entropy Method ◽  
Entropy Method ◽  
Imaging Plate ◽  
Acta Cryst ◽  
Structure Factors

Abstract The nature of the bonding in Be metal was studied by investigating the MEM map, which is the electron density distribution obtained by the Maximum-Entropy Method. In order to avoid extinc-tion effects, 19 Bragg reflections were measured by a new powder-diffraction experiment that utilizes Synchrotron Radiation as an incident X-ray and an Imaging Plate as detector. The experiment was carried out at the Photon Factory BL6A2. In spite of the limited number of reflections used in the MEM analysis, the electron density distribution of Be was obtained accurately and reliably. The structure factors for unmeasured reflections were calculated and compared with the values observed by Larsen and Hansen [Acta Cryst. B40, 169 (1984)]. The agreement is very good. Furthermore, the MEM map revealed that Be metal forms an electronic layer in the shape of a honeycomb that is parallel to the basal plane.

Radial electron density distribution in plasma flow in a coaxial hall accelerator

1989 ◽  
Vol 57 (3) ◽  
pp. 1109-1112
Author(s):  
I. A. Anoshko ◽  
V. S. Ermachenko ◽  
M. N. Rolin ◽  
V. G. Sevast'yanenko ◽  
L. E. Sandrigailo
Keyword(s):  
Density Distribution ◽  
Electron Density ◽  
Plasma Flow ◽  
Electron Density Distribution ◽  
Radial Electron Density Distribution
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