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Thread: Nuclear Pioneer Multichannel Analyzer Gamma Spectrometer

  1. #1
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    Nuclear Pioneer Multichannel Analyzer Gamma Spectrometer

    Hello.
    I made with Teensy 3.5 my Multichannel Analyzer Gamma Spectrometer - Nuclear Pioneer.

    What is Gamma Ray Spectrometer? When a radioactive decay happen, an element emit a beta particle, or an alpha particle or a gamma energy, or all together. Depending on the radionuclide type. Multichannel Analyzer is the device that can interpret the misterious signal coming from a scintiullation probe and to show gamma ray spectrum of the radionuclide under test. It helps to detect radioactive elements and to identify isotopes according to gamma energies they have in range of 32keV-3000keV.

    What Nuclear Pioneer has in hardware? the electronics include High Voltage regulated power module for an external photomultiplier tube (600V-1000V), pulse preamplifier, Teensy 3.5, TFT LCD, encoder, regulated 400V high voltage for internal tiny Geiger Counter.

    The MCA can work as robust gamma spectrometer and as scintillation counter survey meter. It has great count rate performance. It calculate energy compensated doserate in uSv/h units. It can subtract background spectrum in real time. It can detect gaussian peaks in real time. It has small libarary for most known isotopes like Am-241, Cs-137, Ra-226 and daughters, Co-60.

    The photos of the MCA working with NaI(Tl) scintillation probe:
    Radium-226 watch sample test:
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    the 63x63mm NaI(Tl) probe (aluminum tube) is on the left side connected with BNC cable. Test vintage radium watch from 1960...
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    Cs-137 sample:
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    Am-241 sample from smoke detector
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    Eu-152 sample:
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    Scintillation search mode:
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    Menu:
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    Talking to iPhone BLE:
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    interior hardware view:
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    Last edited by AlexRH; 05-25-2021 at 05:04 PM.

  2. #2
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    additional photos of interior hardware:
    Click image for larger version. 

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    Wiki link with basic info about gamma spectroscopy:
    https://en.wikipedia.org/wiki/Gamma_spectroscopy

    Scintillation crystal photo 63x63mm NaI(Tl)
    Click image for larger version. 

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    76mm photomultiplier tubes:
    Click image for larger version. 

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    The assembled probe:
    Click image for larger version. 

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  3. #3
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    just added video to YT:

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