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Spectrum

Spectrum Settings

The spectrum settings can be accessed using the icon button on the "Spectrum" and "View" tabs. The spectrum settings are identical for both pages, but they function independently.

  • Scale of the Y-axis - linear or logarithmic. Quickly switch scales using the icons “Lin.” and “Log.”.
  • Units of the Y-axis - the number of pulses or the counting rate.
  • X-axis units - channel number or photon energy.
  • Graph update:either automatically at a preset interval or manually using the button.
  • Show last channel:Toggle the display of the last channel data on or off. The counter for the last channel includes not only the data from this channel itself but also all data outside the range shown on the graph, so it may not always be interesting to view the last channel.
  • Drawing the graph: You can choose to fill the spectrum graph with color (fill) and outline it with a line, or select one of these options.
  • Drawing the background: You can set the background to fill the graph with color (fill) and outline it with a line, or choose one of these options.
  • Displaying the background: Using the background.
  • Display isotope information: In the application window title bar, show information about the characteristic gamma line of the isotope and decay chain, and provide an icon to access a website for more details. Disabling this option also turns off the display of all isotope lines.
    • Display the position of the gamma lines: Draw turquoise guide lines corresponding to the positions of isotope energies.
    • Display the intensity of the gamma lines: Draw red guide lines corresponding to the positions and intensities of isotope energies.
    • Place markers on the intensity lines: Show the amplitude of gamma line intensity as red dots on the isotope lines.
  • "Spectrum Information" group: You can choose which spectrum information to show in the upper right corner of the graph:
    • Accumulation time refers to the total duration for which the spectrum is recorded.
    • The number of pulses represents the total count of pulses in the spectrum throughout the entire recording duration.
    • The count rate is the average value of the spectrum's count rate across all channels during the accumulation time, meaning it is the total number of pulses from all channels divided by the accumulation time.
    • The dose rate is the average value of the dose rate of the spectrum over the accumulation time. It is calculated using a special algorithm.
    • Dose refers to the radiation dose accumulated during the spectrum's accumulation.
    • Hardness is the coefficient of the spectrum's hardness, calculated from the dose rate and count rate.
  • Display "zoom": Choose the magnifier display mode. Zoom is a small window that shows a section of the graph corresponding to the vertical marker line at an enlarged scale. In "Automatic" mode, the application automatically selects the zoom position based on the vertical marker line position.
  • Indication of spectrum changes:The program will mark the graph with stars at locations corresponding to the pulses registered since the last spectrum update. You can choose to display stars either on the graph curve itself or above the X-axis. The size of the star approximately corresponds to the number of pulses entering the channel.
  • Show the amplification slider: Below the spectrum graph, you can see the slider that adjusts the "amplification" of the histogram. See below.
  • Show the filter slider:Below the spectrum graph, you can see the slider that adjusts the degree of filtering (smoothing) of the histogram. See below.
  • Gaps between bars in the “Fill only” mode: Draw bars with gaps between them, instead of a solid graph contour line, if the selected scale allows it and the "Draw a polyline instead of a histogram" option is disabled.
  • Draw a polyline instead of a histogram:Instead of using rectangular bars (histogram), draw a polyline that connects the midpoints of the tops of the bars. The graph is not entirely accurate because the spectrum accumulation remains discrete for each channel. In this mode, the option “Gaps between bars in the “Fill only” mode” is irrelevant and ignored.
  • Do not show negative values in the spectrum-background difference mode: Display only the peak of the spectrum versus background difference plot that corresponds to positive difference values. Negative values will be shown as zero.
  • Automatically scale the Y-axis: When the scale exceeds 1, automatically adjust the Y-axis scale to match the maximum value of the data in the displayed area of the graph.
  • Export format: Choose the format in which to export the spectrum.
  • CSV Export Separator:You can specify which symbol to use when exporting the spectrum to a text file with the .csv extension (comma or semicolon).
  • Calibration coefficients: a page opens where you can specify the calibration factors a₀, a₁, and a₂.

Spectrum calibration is conducted to convert the spectrum channel number into the emission energy value in keV, using a second-degree polynomial of the form:

E = a₀ + a₁·x + a₂·x²

where

x represents the channel number;

a₀, a₁, a₂ are calibration coefficients.

Updated: Jan 9, 2026