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The worksheet table is saved as an ASCII file that can be edited with the Edit File... feature from the calibration sidebar’s control menu
(Fig. 108) as described in Section 5.3.3.12, or off line with an ASCII text editor.
When the Efficiency graph and table are shown, the marker in the graph window can be moved to an energy by clicking the mouse on the graph, the table, the Full Spectrum View, or the Expanded Spectrum View. The Peak, ROI, and Library indexing buttons on the
Status Sidebar can also be used to move the marker to the desired energy.
Fig. 108. Sidebar
Control Menu.
5.3.3.8. Using The Library
The library can be used to assist in the efficiency calibration in two ways:
! To direct the marker.
! As input for automatic calibration.
To open a library, select Library/Select File.... To display the list of library peaks by energy, choose Library/Select Peak.... This can be done before or during the calibration process.
Arrange the Efficiency Table, graph window, and Library List so the two peak lists are not covered (see Fig. 109).
To select a peak from the Library List, double-click the desired energy in the list. This will move the marker to that energy in the spectrum (updating the view, if necessary), and redisplay the graph and spectrum to reflect the changes.
By clicking on a library peak and then the worksheet, the worksheet is ready for the values for that peak. The half-life is copied from the library to the Half-Life field on the worksheet. You need only to enter the Activity.
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Fig. 109. Using the Library in the Efficiency Calibration.
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