Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland

The principles of X-ray fluorescence ar e briefly described. In particular, two methods of radioisotope X-ray fluorescence analysis ar e discussed: (a) radioisotope X-ray fluorescence analysis by means of portable apparatus incorporating scintillation or proportional counters and balanced differenti...

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Main Author: Kunzendorf, H.
Format: Book
Language:German
Published: Risø National Laboratory 1973
Subjects:
Online Access:https://orbit.dtu.dk/en/publications/d7966d37-865d-4950-a4fe-b019743d5a3f
https://backend.orbit.dtu.dk/ws/files/56233972/ris_m_1610.pdf
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spelling ftdtupubl:oai:pure.atira.dk:publications/d7966d37-865d-4950-a4fe-b019743d5a3f 2023-05-15T16:30:35+02:00 Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland Die Isotop-Röntgenfluoreszenz Analyse und ihre Anwendung bei geochemischen Untersuchungen in Grönland Kunzendorf, H. 1973 application/pdf https://orbit.dtu.dk/en/publications/d7966d37-865d-4950-a4fe-b019743d5a3f https://backend.orbit.dtu.dk/ws/files/56233972/ris_m_1610.pdf deu ger Risø National Laboratory info:eu-repo/semantics/openAccess Kunzendorf , H 1973 , Die Isotop-Röntgenfluoreszenz Analyse und ihre Anwendung bei geochemischen Untersuchungen in Grönland . Risø-M , no. 1610 , Risø National Laboratory , Roskilde, Denmark . Risø-M-1610 book 1973 ftdtupubl 2022-08-14T08:06:20Z The principles of X-ray fluorescence ar e briefly described. In particular, two methods of radioisotope X-ray fluorescence analysis ar e discussed: (a) radioisotope X-ray fluorescence analysis by means of portable apparatus incorporating scintillation or proportional counters and balanced differential X-ray filters, and (b) radioisotope X-ray fluorescence spectrometry by means of Si(Li) or Ge(Li) semiconductor detectors. For a portable radioisotope X-ray fluorescence analyser calibration curves were established for Cr, Ni.Cu.Zn, Zr, Nb, Mo, La+Ce, and Pb in rock powders, Ti.Zr, and Nb in plane cut rock surfaces, and Zr, Nb, and La+Ce in rock outcrops. Detection limits found from calibration data were 0.3% Cr, 0.06% Ni, 0.14%Cu, 0.14%Zn, 0.04% Zr 0.07% Nb, 0.03% Mo, 0.02% La+Ce and 0.1 % Pb in rock powders, 0.07% Ti, 0.4% Zr and 0.1% Nb in cut rock surfaces, and 0.14% Zr, 0,15% Nb and 0.16% La+Ce in rock outcrops. Values for the accuracy and the precision of these analyses ar e given. Special investigations include the dependence of the analytical result on the grain size of the sample material and experiments regarding the critical sample weight. Si(Li) and Ge(Li) X-ray spectrometers for the analysis of rock samples are described. Two methods of X-ray spectrum reduction carried out by means of a 32K computer were investigated: simple channel-by-channel integration and least-squares fitting. Calibration data on rock powders yielded for the Si(Li) X-ray spectrometer (lmCi Cd for excitation of characteristic X-rays) 23 ppm Rb, 110 ppm Sr, 69 ppm Zr, 206 ppm Nb, and 172 ppm Mo as detection limits for the analysis of rock powders. For plane cut rock surfaces and the Ge(Li) X-ray pectrometer (10 mCi Am for excitation purpose) detection limits of 400 ppm Ce and 180 ppm Nd were obtained. The influence of interferences on the analytical result such as overlapping of X-ray peaks, absorption of X-rays in the sample and grain-size effects are dealt with. Special emphasis is given to the correction of X-ray intensities by ... Book Greenland Grönland Technical University of Denmark: DTU Orbit Greenland
institution Open Polar
collection Technical University of Denmark: DTU Orbit
op_collection_id ftdtupubl
language German
topic Risø-M-1610
spellingShingle Risø-M-1610
Kunzendorf, H.
Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland
topic_facet Risø-M-1610
description The principles of X-ray fluorescence ar e briefly described. In particular, two methods of radioisotope X-ray fluorescence analysis ar e discussed: (a) radioisotope X-ray fluorescence analysis by means of portable apparatus incorporating scintillation or proportional counters and balanced differential X-ray filters, and (b) radioisotope X-ray fluorescence spectrometry by means of Si(Li) or Ge(Li) semiconductor detectors. For a portable radioisotope X-ray fluorescence analyser calibration curves were established for Cr, Ni.Cu.Zn, Zr, Nb, Mo, La+Ce, and Pb in rock powders, Ti.Zr, and Nb in plane cut rock surfaces, and Zr, Nb, and La+Ce in rock outcrops. Detection limits found from calibration data were 0.3% Cr, 0.06% Ni, 0.14%Cu, 0.14%Zn, 0.04% Zr 0.07% Nb, 0.03% Mo, 0.02% La+Ce and 0.1 % Pb in rock powders, 0.07% Ti, 0.4% Zr and 0.1% Nb in cut rock surfaces, and 0.14% Zr, 0,15% Nb and 0.16% La+Ce in rock outcrops. Values for the accuracy and the precision of these analyses ar e given. Special investigations include the dependence of the analytical result on the grain size of the sample material and experiments regarding the critical sample weight. Si(Li) and Ge(Li) X-ray spectrometers for the analysis of rock samples are described. Two methods of X-ray spectrum reduction carried out by means of a 32K computer were investigated: simple channel-by-channel integration and least-squares fitting. Calibration data on rock powders yielded for the Si(Li) X-ray spectrometer (lmCi Cd for excitation of characteristic X-rays) 23 ppm Rb, 110 ppm Sr, 69 ppm Zr, 206 ppm Nb, and 172 ppm Mo as detection limits for the analysis of rock powders. For plane cut rock surfaces and the Ge(Li) X-ray pectrometer (10 mCi Am for excitation purpose) detection limits of 400 ppm Ce and 180 ppm Nd were obtained. The influence of interferences on the analytical result such as overlapping of X-ray peaks, absorption of X-rays in the sample and grain-size effects are dealt with. Special emphasis is given to the correction of X-ray intensities by ...
format Book
author Kunzendorf, H.
author_facet Kunzendorf, H.
author_sort Kunzendorf, H.
title Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland
title_short Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland
title_full Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland
title_fullStr Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland
title_full_unstemmed Radioisotope-Excited X-Ray Fluorescence Analysis and its Applications to Geochemical Exploration in Greenland
title_sort radioisotope-excited x-ray fluorescence analysis and its applications to geochemical exploration in greenland
publisher Risø National Laboratory
publishDate 1973
url https://orbit.dtu.dk/en/publications/d7966d37-865d-4950-a4fe-b019743d5a3f
https://backend.orbit.dtu.dk/ws/files/56233972/ris_m_1610.pdf
geographic Greenland
geographic_facet Greenland
genre Greenland
Grönland
genre_facet Greenland
Grönland
op_source Kunzendorf , H 1973 , Die Isotop-Röntgenfluoreszenz Analyse und ihre Anwendung bei geochemischen Untersuchungen in Grönland . Risø-M , no. 1610 , Risø National Laboratory , Roskilde, Denmark .
op_rights info:eu-repo/semantics/openAccess
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