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Core scanning for Th, U and K. Problems and solutions

Technical Report:

Abstract

A core scanner with a 10cm x 10cm Nal(Tl) crystal and a 256 channel analyzer has been built and calibrated for spectral gamma-ray measurement of Th, U and K in cores from boreholes. The calibration has been performed for cores of different diameters and densities, and the influence of liners, incomplete cores, and a varying core to detector distances have been investigated. A single formula for determination of the sensitivities for the window method has been developed. The stability against changes in temperature and radon background is evaluated. Proposals for an improved and faster measuring technique with two or more detectors is put forward. (au).
Authors:
Publication Date:
Aug 01, 1994
Product Type:
Technical Report
Report Number:
BHR-80
Reference Number:
SCA: 540211; 440101; PA: AIX-26:010199; EDB-95:031237; SN: 95001323628
Resource Relation:
Other Information: PBD: Aug 1994
Subject:
54 ENVIRONMENTAL SCIENCES; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DRILL CORES; GAMMA LOGGING; POTASSIUM; THORIUM; URANIUM; ACCURACY; CALIBRATION; GAMMA SPECTROMETERS; GEOMETRY; LINERS; RADON; SENSITIVITY; 540211; 440101; RADIOMETRIC TECHNIQUES; GENERAL DETECTORS OR MONITORS AND RADIOMETRIC INSTRUMENTS
OSTI ID:
10111297
Research Organizations:
Danmarks Tekniske Univ., Lyngby (Denmark). Afd. for Elektrofysik
Country of Origin:
Denmark
Language:
English
Other Identifying Numbers:
Other: ON: DE95612398; TRN: DK9400159010199
Availability:
OSTI; NTIS; INIS
Submitting Site:
DKN
Size:
66 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Korsbech, U. Core scanning for Th, U and K. Problems and solutions. Denmark: N. p., 1994. Web.
Korsbech, U. Core scanning for Th, U and K. Problems and solutions. Denmark.
Korsbech, U. 1994. "Core scanning for Th, U and K. Problems and solutions." Denmark.
@misc{etde_10111297,
title = {Core scanning for Th, U and K. Problems and solutions}
author = {Korsbech, U}
abstractNote = {A core scanner with a 10cm x 10cm Nal(Tl) crystal and a 256 channel analyzer has been built and calibrated for spectral gamma-ray measurement of Th, U and K in cores from boreholes. The calibration has been performed for cores of different diameters and densities, and the influence of liners, incomplete cores, and a varying core to detector distances have been investigated. A single formula for determination of the sensitivities for the window method has been developed. The stability against changes in temperature and radon background is evaluated. Proposals for an improved and faster measuring technique with two or more detectors is put forward. (au).}
place = {Denmark}
year = {1994}
month = {Aug}
}