2026-04-16T05:26:35Zhttp://doidb.wdc-terra.org/oaip/oaioai:doidb.wdc-terra.org:2082016-11-25T15:14:56ZDOIDBDOIDB.SDDBfalse3DOIDB.SDDB
10.1594/GFZ.SDDB.1341
KTB, WG Geophysics
Natural Gamma-ray Activity of Cores of the KTB Main Hole HB1g
Deutsches GeoForschungsZentrum GFZ
2010
German Continental Deep Drilling Program
Land based
Core Length
Count Rate
Date of Sampling
Density
gamma spectrometry
heat production rate
Potassium
Th/U
Thorium
Uranium
2010-09-29
eng
Dataset
153 DataPoints
text/tab-separated-values
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.
49.588 12.192