A stand-alone natural gamma system designed to obtain both total and full spectral natural gamma data.

MSCL-NG Natural Gamma Core Logger

  • Key Features

    • Fully automated core motion with linear precision of 0.1 mm
    • Two check sources are provided for energy calibration of the detectors
    • Core sizes up to 155cm in length and up to 150mm in diameter
    • ASCII text files data output

Natural Gamma Detectors

The sensor comprises two to four 3″ x 3″ NaI(Tl) detectors housed in 6″ diameter lead shields. Each detector uses a NaI(Tl) crystal optically coupled to a photomultiplier tube and a Multi-Channel Analyser (MCA). Each of the detectors has a resolution of 6-8% specified at the 0.662 MeV peak of 137Cs. The data are collected by the MCAs over the energy range 0-3 MeV.

The detectors make measurements over 1024 channels calibrated to correspond to 0-3 MeV energy range. In the full spectral mode the relative elemental yields of K, U and Th can be obtained if a suitable core standard (with known concentrations of K, U and Th) is available.