GammaVision
®
v7 (A66-BW) 783620H / 1013
Editing the Geometry Correction Table
To remove an energy from the Geometry Correction Table window, select it with the mouse and click the sidebar’s Delete button. To change an energy, select it from the table with the mouse, go to the Ratio section of the sidebar, change the values, and click Enter.
To save the current table, click the Save... button in the sidebar. Click Recall... to open a standard file-open to recall an existing
.GEO
file.
The Geometry Correction Sidebar’s Control Menu
This sidebar’s control menu contains the same commands as shown in Fig. 152. To edit an existing file in a Notepad-like editor, click Edit File.... This opens a standard file-open dialog to select the file, then an ASCII editor screen showing the file contents. Any changes made will be saved to the file. The formatting does not have to be exactly as shown.
The Destroy selection erases all the values and energies in the currently displayed table. It does not alter the disk file (if any) unless the current table is then saved with the same filename.
Restore will undo any changes made to the current table, including Destroy, as long as it is
used before the Geometry Correction Sidebar is closed.
Close ends the Calculate from Spectra session, closing the sidebar and the Attenuation Table and graph windows. The currently selected table becomes the internal or working geometry table.
5.5.1.5. Peak Background Correction
The Peak Background Correction submenu is shown in Fig. 154.
Use these commands to load a new working
.PBC
file, to create or edit
.PBC
files, and print PBC tables. The PBC file is used with the
Peak Background Correction in the spectrum analysis. Note that the
PBC correction is related to the detector and the shield, but not to the geometry of the sample. The
.PBC
files are organized by nuclide, then by peaks, for each nuclide. Any of the correction table nuclide
Fig. 154. PBC
Menu.
data include the nuclide name, which can be any combination of eight characters, but must be consistent throughout all files.
At startup, GammaVision automatically attempts to load the PBC table last loaded. Thereafter, it can be replaced at any time using Select PBC.... It stays resident in memory after it have been loaded.
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