Perform a batch or individual evaluation on all measurements, and open a multi-line spectrum with the Peak evaluator. Check the FWHM calibration, and adjust the region fits, if necessary. Finally save the peak list, which will be input for the nonlinearity evaluation.
When all measurement are properly fitted, similar statistics will be displayed about them at the right side of the Main Module window as you can see in this picture.
Open Analyses node under your project, then click on Nonlinearity analyses and select Create a new nonlinearity analysis task.
A new window appears now, where basic parameters of nonlinearity fit algorithm may be specified.
You can specify a descriptive name of the new nonlinearity analysis, and thresholds for the identification of peaks.
The Peak identification limit is used when peaklist peaks and nuclear library peaks are matched. If the difference between peak centroids is below this value, the peaks will be considered as matching. Its usual value is 3 channels, which is appropriate for measurement setups with moderate nonlinearity.
The Radiation intensity limit is used when radiations are loaded for a selected decay from the database. The 0.005 default value load the radiations where the intensity is greater than 0.5% of the decay's strongest line. When you are ready, press OK.
The Nonlinearity evaluator appears now with the empty Input data sheet.
Click Add measurement button at the right. The Measurement selector window appears now.
Select the 56Co sample measurement from the project, named COD0111A.DAT.
When you click OK in the measurement selector window, HyperLab performs the steps as follows.
If enough data points are supplied, the fit is performed and the tab Fit becomes active, displaying the fitted nonlinearity curve.
Now you can add your other measurements to the fit one-by-one, or more at a time.
Finally a multi-isotope nonlinearity curve may be constructed.