Medusa Radiometrics MS‐350 gamma‐ray spectrometer data processing - ugcs/GeoHammer GitHub Wiki

A gamma-ray spectrometer (GRS) is a scientific instrument designed to measure and analyze the energy and intensity of gamma rays emitted by radioactive substances. Gamma rays are high-energy electromagnetic radiation, and their specific energies are unique to the elements emitting them, making gamma-ray spectrometers essential tools in many fields. The solution utilizes the Medusa Radiometrics gamma-ray radiation sensors to detect and analyze signals emitted by soil radionuclides, such as potassium ${\color{red}K-40}$, uranium ${\color{red}U-238}$, thorium ${\color{red}Th-232}$, and cesium ${\color{red}Cs-137}$.

Data was gathered using a Medusa Radiometrics MS-350 gamma-ray spectrometer over the SPH Engineering's test range.

Link to the data samples used in this tutorial.
Check the attachment tab for MS-350_1m_AGL_2024-08-28T09_56_45.zip. After downloading it, select file 'concentrations.csv'

More detailed report about the Medusa MS-350 gamma-ray spectrometrer can be found here.

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1. Use the “Open files” toolbar button or Drag & Drop the required file for processing.

2. Use the “Select Area” button to choose desired survey area and click “Apply Crop”.

3. We won't be doing LP-filter for these datasets so the next step is to choose what kind of data do we want to see. By using central option menu for choosing different data, we can select our required radionuclides for gridding but if we don't need to know a specific isotope we can use 'Total'. For gridding choose settings appropriate to your survey area - start with cell size 1/4th of the spacing between lines and gradually decreasing it, in our case we'll do Cell size 0.1 and Blanking distance 2.5 to cover our survey area.

Note, that soil radionuclides ${\color{red}K-40}$, ${\color{red}U-238}$, ${\color{red}Th-232}$, and ${\color{red}Cs-137}$ are shown in Bq/kg, where as 'Total' shows ppm (parts per million).

4. After choosing your required map, you can export it as .tiff file that you can upload to any CAD/GIS software.
   Note, that this option is only available for licensed software!