Natural Gamma-ray Activity of Cuttings of the KTB Main Hole HB1 (measurements with Germanium detector only)

Cite as:

KTB, WG Geophysics (2010): Natural Gamma-ray Activity of Cuttings of the KTB Main Hole HB1 (measurements with Germanium detector only). Deutsches GeoForschungsZentrum GFZ. https://doi.org/10.1594/GFZ.SDDB.1318

Status

I N R E V I E W : KTB, WG Geophysics (2010): Natural Gamma-ray Activity of Cuttings of the KTB Main Hole HB1 (measurements with Germanium detector only). Deutsches GeoForschungsZentrum GFZ. https://doi.org/10.1594/GFZ.SDDB.1318

Abstract

In the laboratory, the gamma radiation is measured by a sodium iodtite (NaI) scintillation detector (cores and cuttings) and by a germanium (Ge) semiconductor detector (cuttings).The cuttings are measured in air tight Marinelli-beakers with a volume of 250 cm3. For the core measurements a special, automatically operating equipment with three NaI detectors is used. A description of this apparatus is given in Wienand et al. (1989). The principle of measurements with the Ge-detector is described by Bücker et al. (1991). The measured spectra are calibrated by a standard of Luvarovite (NIM-L, South African Bureau of Standards). The influence of the local terrestrial radiation on the measurements has been corrected. Especially for the core measurements a calibration procedure has been performed for geometric corrections (core diameter and length). In general, a measuring time of 12 h for the NaI-detector and 2 h for the Ge-detector was chosen.

Authors

KTB, WG Geophysics

Keywords

, Geology

GCMD Science Keywords

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