783620H / 1013 6. ANALYSIS METHODS
! In ROI32 engine, if a nuclide has multiple peaks and only one peak is marked with a ROI, then the nuclide activity displayed is the activity of only the marked ROI peak.
! In the WAN32 analysis results section of the report, the nuclide activity is the same as the activity reported in the ROI Peak Summary section of the report.
6.2.2. Selecting an Analysis Engine — Decision Matrix
A library-based peak search looks for potential peaks for all gamma rays listed in the library.
Sensitivity is set by the Peak-Cutoff settings. A Mariscotti peak search uses a second differential method to identify peaks. Sensitivity is set by the Peak-Search Sensitivity setting. Mariscotti peak searches do a better job of identifying peaks within multiplets; library-based peak searches will do a better job of finding a weak or misshapen peak listed in the library.
Feature
Uses an initial Mariscotti peak search
Uses an initial library-based peak search
ROI peak search on user-marked peaks
Library based peak stripping
Manual based peak stripping
Removes nuclides from library not found in a preliminary peak search
Reports MDA for removed nuclides
Utilizes gain shift corrections
Directed fit (negative or misshapen peak areas) option available
More sensitive in finding misshapen peaks
Displays all possible library nuclide matches and calculates activity for all peaks found.
a
Singlets and multiplets.
b
Singlets only.
ENV32 WAN32 NPP32 GAM32 ROI32
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235
