Description: 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.
Global identifier:
Doi(
"10.1594/GFZ.SDDB.1339",
)
Origins: /Wissenschaft/GFZ Data Services
Tags: Gammastrahlung ? Kalium ? Germanium ? Sensor ? Thorium ? Uran ? Strahlungsmessung ? Höhle ? Core Length ? Count Rate ? Date of Sampling ? Density ? German Continental Deep Drilling Program ? Land based ? Th/U ? gamma spectrometry ? heat production rate ?
License: unbekannt
Language: Englisch/English
Issued: 2010-01-01
Time ranges: 2010-01-01 - 2010-01-01
Accessed 1 times.