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about
main spectrum
dialog box.
All parameters mentioned above are automatically calculated only then, when
in
analysis options
option
Automatic calculate activity and
concentration is checked.
9.7
Nuclide library editor
Since installation, program contains a library of nuclides files (with
extension
"tnc"). They are placed in directory "Library".
In
program configuration
user may set name of library automatically read into
the memory during each program execution.
Option "Libraries editor..." from menu "
Analysis" shows dialog window. This
window presents contents of the library. User may change library using this
window also.
Preview and library edition:
icon:
menu:
Analysis | Libraries editor...
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Analysis
Sorting data
Library dialog window allows to sort data using: names of nuclides, energies, line
intensities and half lifetimes.
Sort is run by clicking a header of given column or by
choosing a sort criterion in
window "Data sort".
Edition of the library of nuclides
User may add a new position to the library (button "
+
" on the navigation bar) or
remove one (button "
-
") or change contents of any field.
Library file should be saved after any changing - program informs about that in
communicate after closing dialog window.
All changes may be canceled using button
Cancel changes.
New library of nuclides
Navigation bar of the dialog window contains position
New library.
This button or
combination of keys
removes all the library data from memory. Buttons
of the navigation bar of the data table is useful for filling new data. Using
key or mouse pointer simplifies movement on the tables fields.
New library should be saved to file with extension "tnc".
Note:
new file contains only position with filled all data fields.
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Format of the library file
Library file contains ASCII text. Each positions are represented by new line.
Columns are separated by two spaces.
Peaks identification
Peaks table
9.8
Peaks table
Peak table contains the following parameters of the chosen
ROI:
left and right
marker position limiting ROI, FWHM, area under the peak etc.
Tables of ROI may be built manually or automatically by the
Peak search
command.
Peak table - show dialog box with peaks table
icon:
menu:
Analysis | Peak table
or ROI toolbar:
The contents of the peak table is connected with the main spectrum. It will
change with respect to change the main spectrum.
The
unit
of the peak table columns are related with
the unit of the parameters
placed in the field under the spectrum. It could be channels or energy units (like
eV, keV or MeV)
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Analysis
If analyzed spectrum contains efficiency calibration then set of parameters in the
peak table changes as follows:
Edition of peak table
This program version does not allow direct edition of peak table, because it is a
direct copy of ROI table; you can delete and
add new ROI directly on the
spectrum.
Mathematical analysis – algorithms
9.9
Analysis options
Program configuration
Analysis configuration may be set and changed through a dialog window from the
menu.
menu:
Configuration | Options...
Analysis options can be set in the
Analysis tab.
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Peak parameters:
Automatic calculate parameters – switches on/off
automatic calculation of peak
parameters lying between the markers, performed after every change of marker
placement or spectrum refresh.
Automatic calculate activity and concentration – as above
Automatic peak ident – switches on/off mode of automatic peaks identification
performed after every recalculation of peak parameters.
The necessary condition
for this is nuclide library to be loaded from selected file.
Parameters in energy units – if set, then the program displays peak parameters
in energy units (if a spectrum is calibrated) when the main spectrum is changed.
Model f0 option:
- selection of mode of peak parameters calculation:
Peak parameters based on netto count – Model f0 – peak parameters are
calculated based on netto counts in channels
Peak parameters based on total count – Model f0c – peak parameters are
calculated based on real counts in channels (without background subtraction),
peak position (Ctr) is calculated as weighted
average of counts in channels
Peak position (Ctr) in maximum – Model f0cm – peak parameters are
calculated based on real counts in channels (without background subtraction),
peak position (Ctr) is placed in a channel containing the highest number of
counts
In peak parameters panel (below panel of a spectrum view) and in peaks table,
mathematical model based on which calculation was performed is always visible.
Activity units:
Selected unit – Bq, kBq or MBq is obligatory for all modules of the program
