GammaVision
®
v7 (A66-BW) 783620H / 1013
reported in the Summary of Nuclides in Sample if it is determined that the peak was misidentified or misinterpreted due to peak interferences. This type of correction may be desired in some cases for manual interference calculations, reporting of conservative activity results, or to correct for inaccurate nuclide identification. The data from this table can also be used to compare the results of the Mariscotti vs Library Directed Peak Search and fitting to help identify where library or analysis option changes may be needed.
7.7.5. Unidentified Peak Summary
This table (Fig. 266) displays peaks found in the spectrum that were not associated with a library nuclide, with the clarifications below.
Fig. 266.
342
! The Unknown peaks option must be enabled on the Report tab for this table to be displayed.
! Only peaks with1-sigma counting uncertainty below the Peak Cutoff value are reported.
! The uncertainty displayed is based on the Confidence level selected on the Report tab.
! The “Suspected Nuclide” is determined by selecting the nuclide from the suspect library that has the closest peak energy to the unidentified peak energy and is within the b30winds.ini
file “Range Multiplier” parameter multiplied by the peak FWHM. The
Range Multiplier is normally set to 2.0 but you can modify this. If there are no nuclides with peak energies in the specified range, the “Unknown Suspect” text from the b30winds.ini
file is displayed in this column (“-“ by default).
! If the b30winds.ini
parameter “Unidentified Peak Summary and Library Peak Usage
Format flag” is set to “T” (true), then the fifth column is labeled “Efficiency * Area” and
