Importing steps

First create a project node in Main Module, which will contain all the sample measurements and their evaluations.

Then initiate the import of the sample spectra by right-clicking the Measurements node under the project and the select Import spectrum files from the pop‑up menu.

The Spectrum file importer window appears now.

Click Add files button, and select all 10 sample Accuspec spectra ending with “A” in their file name, as can be seen in the picture.

Click the Main settings tab now in order to specify details for your spectrum files.

Here you should specify the Dual LFC spectrum evaluation mode first, as these measurements are created using an LFC module, allowing compensation for count losses due to varying or high count rate situations.

At the Measurement setup combo box, you should select HyperLab's sample measurement setup. This is an important setting, because all calibration analyses, e.g. the nonlinearity will belong to a specific setup, thus the calibration assignment can be automatic.

If the sample setup can not be found in the list, create it by clicking on the New entry button beside the combo box.

If creating of a new measurement setup is necessary, this entry editor will pop up. The editing can be done on the regular way, as described in the Importing spectrum files section of the Main Module Quick Start Guide.

When you are ready, click OK. The spectrum import form will appear again.

You should check the Calibrations tab now, where the source of FWHM and energy calibrations should be set to Spectrum files' own calibration values.

Click Load files button in order to initiate the spectrum loading.

All selected spectrum files will be loaded now, and the importer will provide basic information on the loading process.

Click Close to finish loading.

The database browser now displays the imported spectra. Now we will complete their missing sample settings.

Sample information is currently only used for calibration measurements, serving as input for later nonlinearity, efficiency and resolution analyses.

These analyses will identify gamma lines by using isotope information, which is in turn supplied by the user, during the sample definition.

Radioactive source details

HyperLab's sample spectra are taken with the following radioactive sources:

Spectrum file	Source name	Isotope	Activity	Act. unc.	Ref. date
AM80320A.DAT	Am-241 OMH 80-320	Am-241	221.50 kBq	1.0 %	1 Oct 1980
BA85211A.DAT	Ba-133 OMH 85-211	Ba-133	456.40 kBq	1.5 %	1 Oct 1985
CD01043A.DAT	Cd-109 OMH 2001-043	Cd-109	100.44 kBq	0.5 %	1 May 2001
CO01042A.DAT	Co-57 OMH-01-042	Co-57	32.63 kBq	0.5 %	1 May 2001
CO85185A.DAT	Co-60 OMH 85-185	Co-60	434.60 kBq	0.7 %	1 Oct 1985, 12:00
COD0111A.DAT	Co-56 (Ref.:2001/11/1)	Co-56	-	-	-
CS96147A.DAT	Cs-137 OMH 96-147	Cs-137	20.75 kBq	1.5 %	1 Dec 1996, 12:00
EU80297A.DAT	Eu-152 OMH 80-297	Eu-152	250.30 kBq	2.0 %	1 Dec 1980
MN01041A.DAT	Mn-54 OMH 2001-041	Mn-54	18.98 kBq	0.5 %	1 May 2001
RA37076A.DAT	Ra-226 PTB 370-76	Ra-226	112.00 kBq	0.667 %	1 Jan 1978
		Pb-214, Bi-214	-	-	-

The corresponding radioactive sources must be created and assigned to the proper imported measurement. When no activity data is indicated, no absolute activity value is known.

Absolute intensities used only for absolute full-energy detector efficiency determination.

However, for source “Ra-226 PTB 370-76” you can specify 1 calibrated isotope (Ra-226) together with 2 uncalibrated ones (Pb-214, Bi-214). As these latter have many gamma lines, even detector efficiency is able to use them, as the relative intensities of the lines carry valuable information.

To define a source for a measurement, click the measurement and select its Measurement properties task. The measurement's property editor window appears now.

Please check if its Source field is set. If there is no reference to an existing source, or the Measurement object type field does not set to Source, then please define the source properties for measurements.

Set the Measurement object type field to Radioactive source, and check in the list of Source field's combo if the searched source is already defined. If it is already in the list, then select it, and click OK to finish editing of measurement entry.

If the source list does not contain the searched source, click the Create new source entry button beside the combo box.

A source record editor page appears now. For further details on source entry editing, see section “Source properties editor window”.

Note: Alternatively, instead of batch file importing, we could have loaded the spectra one by one, while supplying the sample information under the Sample tab for each spectrum file.

When all source data is properly set for each sample measurement, the loading of sample spectrum set is finished.

With a few minutes of work, a rudimentary Nonlinearity analysis and very simple Detector efficiency analysis can be created from these sample spectrum files, and a tentative Nuclide identification can be performed with nice results.