Title 



Radiometric diameter concept and exact intensities for spherical particles in xray fluorescence analysis
 
Author 



 
Abstract 



In Xray fluorescence analysis the concept of radiometric diameter, d, is often introduced in considerations of the fluorescent intensity from a particulate sample. It represents the mean geometric path of the Xrays through one particle and is usually simply taken to be equal to the volumetoarea ratio of the particle. The effective radiometric path is, however, itself dependent on geometry and absorption effects. Rigorous calculations of the fluorescent intensity from a particle in the π and π/2 geometries were carried out to evaluate the errors involved. It appears that, for π geometry, the discrepancy between these exact results and the intensity calculated via the use of d does not exceed 5.2%. For the π/2 geometry, the errors are much larger and can amount to 50% in realistic cases of Xray fluorescence analysis. These conclusions are also applicable to monolayers. The effective radiometric diameter approaches d only when absorption effects become negligible, but is smaller in other cases.   
Language 



English
 
Source (journal) 



Xray spectrometry.  London  
Publication 



London : 1980
 
ISSN 



00498246
 
Volume/pages 



9:2(1980), p. 5256
 
ISI 



A1980JN16500003
 
Full text (Publisher's DOI) 


  
