Auger energies, branching ratios, widths and x-ray rates of doubleK-vacancy states of Ne2 +: a close-coupling calculation

2013 ◽  
Vol 46 (14) ◽  
pp. 145002 ◽  
Author(s):  
Yanpeng Liu ◽  
Jiaolong Zeng ◽  
Jianmin Yuan
Keyword(s):  
Branching Ratios ◽  
Close Coupling ◽  
X Ray ◽  
Coupling Calculation

An x-ray microprobe based upon a close-coupled focal-spot / glass capillary arrangement

1992 ◽  
Vol 50 (2) ◽  
pp. 1758-1759
Author(s):  
D. A. Carpenter ◽  
M. A. Taylor
Keyword(s):  
Imaging Techniques ◽  
Fluorescence Analysis ◽  
High Sensitivity ◽  
Specimen Preparation ◽  
X Rays ◽  
Glass Capillary ◽  
Close Coupling ◽  
X Ray ◽  
Point To Point ◽  
Beam Damage

The development of intense sources of x rays has led to renewed interest in the use of microbeams of x rays in x-ray fluorescence analysis. Sparks pointed out that the use of x rays as a probe offered the advantages of high sensitivity, low detection limits, low beam damage, and large penetration depths with minimal specimen preparation or perturbation. In addition, the option of air operation provided special advantages for examination of hydrated systems or for nondestructive microanalysis of large specimens.The disadvantages of synchrotron sources prompted the development of laboratory-based instrumentation with various schemes to maximize the beam flux while maintaining small point-to-point resolution. Nichols and Ryon developed a microprobe using a rotating anode source and a modified microdiffractometer. Cross and Wherry showed that by close-coupling the x-ray source, specimen, and detector, good intensities could be obtained for beam sizes between 30 and 100μm. More importantly, both groups combined specimen scanning with modern imaging techniques for rapid element mapping.

X-RAY ABSORPTION MAGNETIC CIRCULAR DICHROISM: SIMPLIFIED SPIN-ALIGNMENT ANALYSIS OF F ELECTRON SYSTEMS

1993 ◽  
Vol 07 (05) ◽  
pp. 317-323 ◽  
Author(s):  
J. G. TOBIN ◽  
G. D. WADDILL
Keyword(s):  
Rare Earth ◽  
Magnetic Circular Dichroism ◽  
Branching Ratios ◽  
Electron Systems ◽  
Spin Alignment ◽  
X Ray ◽  
Analogous Expression ◽  
Alignment Analysis ◽  
Limiting Case ◽  
X Ray Absorption

A simplified expression relating branching ratios to spin-alignment and circular polarization is presented for X-ray absorption in the rare-earth and actinide elements. This approximate method, while probably of less comprehensive utility than the analogous expression for 3d materials, can still provide useful information under many conditions, particularly limiting case situations. Analysis of gadolinium data will demonstrate the utility of this method.

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