783620H / 1013 5. MENU COMMANDS
Background
The corrected peak background calculated by the program.
Counting uncertainty
The 1-sigma counting uncertainty in the peak net area, as a fraction.
Isotopic abundance
The activity for this nuclide based on this peak only. It is zero for unknown peaks or if there is no efficiency calibration.
MDA
The minimum detectable activity for this nuclide based on this peak only. It is zero for unknown peaks or if there is no efficiency calibration.
Width of background region below peak
Width of background region above peak
The number of channels used in the calculation of the background below and above the peak
(as selected on the Sample tab under Analyze/Settings/Sample Type...). If the background selection is set to a given number, then these will both be the same. For the Auto background setting, these can be different.
Average background below peak
Average background above peak
TCC flag
Was TCC enabled?
Original branching ratio of TCC peak
Original branching ratio if TCC was enabled
Suspect library nuclide
Suspect library nuclide name, if peak was not identified.
Second MDA value
If a second MDA calculation is requested in the b30winds.ini
file, this is the second MDA value. Otherwise, the value is zero.
5.5.7. Interactive in Viewed Area...
Interactive in viewed area... starts an interactive analysis session by analyzing the spectrum now displayed. This command is active only when the Expanded Spectrum View displays
#4096 channels (zoom in on a portion of the spectrum to activate this command). The working library
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selected with Library/Select File... is used. The analysis parameters have been set in the
Analyze/Settings/Sample Type... dialogs. When the analysis is complete, the graphical results and peak area table are displayed as illustrated in Fig. 194. The table records can be sorted by such parameters as energy, area, FWHM, and background by clicking on the desired column header.
NOTE
This interactive method uses a different analysis engine than the one specified in the
Sample Defaults (Analyze/Settings/Sample Type...), therefore, results from the two engines might differ somewhat. To see the analysis results generated by the Sample
Defaults, use Display Analysis Results... instead of the interactive function.
Fig. 194. Results Interactive in Viewed Area.
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783620H / 1013 5. MENU COMMANDS
Figure 195 shows the interactive Analysis Sidebar. The buttons move the marker up and down through the results lists, library, and spectrum simultaneously.
The buttons in the Library Peak section pertain to the results from the analysis; the other buttons pertain to the spectrum. The peak-found buttons move to the next higher or lower peak in the analysis results list. This includes non-zero-area library and unknown peaks above the cutoff.
See Peak button below.
The within Nuclide buttons move up and down the library list for the selected nuclide, in the order the energies are stored in the library. Since the library energies are not usually stored in increasing energy order, this will jump the marker around in the spectrum. This is useful in deciding if a nuclide is present or not, by looking for all the lines associated with the nuclide. Only non-zero-area peaks are displayed.
The Energy buttons move the marker up and down through the library peak list in energy order. Only nonzero-area peaks are shown. Since the library used for the analysis might not be the same as the working library, this might be a different set of peaks than found with the Peak buttons.
Fig. 195. Analysis
Display Controls.
The Peak buttons move up and down through the peaks found by the online peak search. (The sensitivity is set in the system settings.) This might select more peaks than the analysis peaks above because of the difference in the cutoff. If the sensitivity for analysis is low, e.g., 5%, many peaks will not be reported because their uncertainty is too high. They will have been found by the analysis, but not reported.
The Unknown buttons move the marker up and down through the unknown peaks in energy order, skipping over any library peaks. Only peaks that satisfy the sensitivity cutoff are shown. Note that the Library Peak and
Unknown buttons select different groups of peaks.
The Multiplet buttons move up and down through the multiplet or deconvoluted regions in the spectrum. The next time the multiplet up button is clicked, the marker goes to the first (lowest-energy) peak of the next-higher multiplet. The next down button goes to the last (highest-energy) peak of the
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