3.2.8. Changing a Library. ORTEC A66-BW GammaVision

783620H / 1013 3. GETTING STARTED — A GAMMAVISION TUTORIAL

Now click Next. GammaVision will now perform the two calibrations. The results are shown in

Fig. 33. The Fit vs. Energy display on the lower right refers to the true-coincidence correction calibration. Since this example does not use the TCC calibration, its display is marked

Uncalibrated

.

Fig. 33. Energy and Efficiency Calibration Results.

Click Save Calibration and assign the filename

GVDEMO.CLB

. Finally, click Finish — that’s

all there is to it!

3.2.8. Changing a Library

Select Library/Edit/GammaVision Editor... from the menu bar. This will open the Editing dialog (Fig. 34), which allows you to change, add, or delete nuclide and gamma-ray values in the currently loaded nuclide library file.

Select the nuclide

60

Co from the left-hand section of the dialog. All the gamma-ray energies or peaks for this nuclide will then appear in the Peaks section; select the 1332.5 keV peak. Click

Edit... in the Peaks section. This will open the Edit Library Peak dialog (Fig. 35), which will show the current values and allow you to change the energy and gammas-per-disintegration of the 1332.5 keV line.

Click the Gammas per 100 disintegrations field and change the value, then click OK. You will see that the Gammas per 100 Disintegrations value for this peak has been changed to the number you just entered.

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