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When you activate an ROI by clicking on it, the Marker
Information Line (Fig. 323) displays the following information about the active ROI:
(a) The marker position, in channels and energy
(b) The counts in the marker channel
(c) The start and end points for the ROI, in channels for uncalibrated spectra and energy for calibrated spectra
(d) The total counts in the ROI
(e) The nuclide name, if identified
(f) The net peak area, in counts
(g) The peak background area, in counts
(h) The activity in the peak, in becquerels
11. UTILITIES
Fig. 322. Inactive (solid) and Active (diagonal fill)
ROI Bars.
Fig. 323. The GVPlot Marker Information Line.
You can shift the start or end channel of an ROI by moving the mouse over an ROI bar until the pointer changes to a double-arrow, then clicking and dragging the ROI bar to the desired location
(allow a moment for the display to update). In addition, you can widen the ROI in the Modify
Active ROI mode (Section 11.1.3.4).
Set the color of the ROI bars with the Markers droplist in the Graph Properties dialog (select
Properties from the right-mouse-button menu or Options/Graph...).
11.1.4.9. Peak Info
This command opens a Peak Info box (Fig. 324) for the selected peak and leaves the box open until you click inside it. This command works for peaks loaded from a
.UFO
file and ROIs created within GVPlot or loaded from an
.ROI
file. The contents of the Peak Info box are described in Section 5.4.3. You can simultaneously display multiple Peak Info boxes as long as they do not overlap (opening a new Peak Info box closes any overlapping boxes). For very narrow peaks, you might find it useful to position the marker with the left/right arrow keys before calling the Peak Info command. When the marker is on a peak, the right side of the Marker
Information Line will display a Peak Area readout.
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