Download Iridium Ultra Version 1.4 Software User`s Guide

IXRF Systems, Inc. – Iridium Ultra Software User's Manual Rev 1.4
9.6
The Sum Spectrum and Maximum Pixel
The Sum Spectrum records all x-rays that have been acquired during the map acquisition, thus it is the sum
of all x-rays from all pixels in the map. The Summation Spectrum is sensitive to the dominant features of
the data cube.
The Sum spectrum is always available in the display area below the maps, as shown below.
The Maximum Pixel Spectrum is calculated and displayed with the menu item Process/Maximum Pixel
Spectrum. It can be used to detects elements that are only present in a few pixels in the map. The
Maximum Pixel Spectrum is a spectrum comprised of the maximum x-ray intensity from all pixels in the
map. For example, the intensity in the spectrum at 6.4 keV is the maximum intensity found at 6.4 keV
from all of the pixels in the map. This pseudo-spectrum has the principal characteristics of a real spectrum
so that x-ray peaks corresponding to highly localized trace constituents or foreign contaminants, even those
that are confined to one pixel of the image, can be seen at a glance.
Below is an example of a Maximum Pixel Spectrum.
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