training for advanced research


Glossary terms about Background

The contribution of Bremsstrahlung X-rays to the X-ray counts under a Characteristic X-ray peak.

11 pages mention Background

Accuracy, Precision and Detection Limits
The minimum detection limit is the concentration corresponding to a peak that can just be distinguished statistically from background fluctuations. 
Background information - What is energy dispersive X-ray spectroscopy?
Two types of X-rays result from these interactions: Bremsstrahlung X-rays, which means ‘braking radiation’ and are also referred to as Continuum or background X-rays, and Characteristic X-rays. 
Bremsstrahlung X-ray generation
Note: Bremsstrahlung X-rays are also referred to as continuum or background X-rays. 
This module will provide you with background information and practical advice for the successful operation of a range of microanalytical methods, with emphasis on techniques that are commonly hosted on SEMs and TEMs. 
K-lines animation
Click the buttons to show each peak. Show CShow SShow Ca The Kα X-ray peak for carbon (Z=6)  
KL-lines animation
Click the buttons to show each peak. Show ScShow Zn For scandium (Z=21) the Kα and Kβ peaks are resolved and L-family peaks are visible at low energy.  
L-lines animation
Click the buttons to show each peak. Show RbShow TcShow Sb For rubidium (Z=37) the Ll peak can be seen on the low-energy side of the main L-family peak.  
M-lines animation
Click the buttons to show each peak. Show HfShow PbShow U For hafnium (Z=72) the Mζ peak (low energy) and Mγ peak (high energy) can be seen on either side of the main M family peak.  
Quantitative EDS X-ray microanalysis using SEM
There are two steps involved: firstly, the Bremsstrahlung (background or continuum) X-ray counts have to be subtracted from the spectrum, and secondly the Characteristic X-ray peaks have to be processed to derive the concentration of the element concerned. 
X-ray detection by EDS
X-Ray mapping
Some X-ray maps show the number of X-ray photons of a specified energy generated from each point over a fixed counting time (raw X-ray counts) and do not apply any corrections for background or overlapping peaks.