SAIC Exploranium – GR-135 System Manual page: 25
“-more-“ - The word “-more-“ is displayed at the bottom of the screen when more peaks have
been identified than can be displayed on one screen. A short CLICK DOWN will show the
next screen with a continued display of computed peaks. If “more” is not shown, then all
identified peaks are displayed and ENTER returns you to the ANALYSIS menu.
ENTER to go back to the Identify menu
7.7 NUCLIDE IDENT
If this mode is activated then a new Nuclide Identification analysis of
the selected spectrum is carried out. The display shows
“ANALYZING SPECTRUM PLEASE WAIT” for a few seconds
then the display shows the NUCLIDE LIST screen – Fig. 19. Note
that this display is a more complex version of the previous Nuclide
ID display shown in Fig. 11 as this secondary display is intended to
show a higher level of details for further user analysis.
Cs-137 – is the isotope label of the identified isotope
21 - this is the relative amplitude of the isotope in Standard-
Deviation units. In the case of an isotope with multiple Fig. 19
peaks this is the sum of all the relevant peaks.
Non Identified – this shows the sum of all the peaks that cannot be identified. Usually these peaks
are very small so they are suppressed in the simplified analysis screen as for most users they
are confusing, however for specialized users they may be of interest. Note in the AUTO
display, any peaks that are statistically unimportant are suppressed
HIGHLIGHTING – when the display appears, the first isotope is highlighted. The joystick can be
used to move up/down the displayed list to highlight a required item
RETURN – pressing ENTER goes to the main Identify menu
7.7.1 NUCLIDE DETAILS
When the highlighted isotope is selected by cursor, then ENTER
pressed, the details of that isotope selection are displayed – Fig. 20.
This display shows all the peaks related to the isotope and various
data about them:
Cs-137 – is the isotope identified then selected
1/1 – relates to the isotope identification requirements in this case
a single peak is required for identification
662 – the peak in keV
Fig. 20
6.6 – the FWHM of the peak, a useful measure of peak quality
15 – the amplitude of the peak in SD units
ENTER returns to the IDENTIFY screen
NUCLIDE LIST
Cs-137 21
Non Identified 4
RETURN
Cs-137 1/1
662 6.6 15
30 30.0 11
ENTER TO CONTINUE
NUCLIDE DETAILS
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