00000nam 2200000za 4500 9.850132 CaOODSP 20241203113641 cr ||||||||||| 180116s1986 oncab||fob f000 0 eng d CaOODSP eng eng fre n-cn--- En13-5/86-183E-PDF Joshi, S. R. (Sewak Ram) Direct determination of geochronologically-useful radionuclides in sediments by low-energy photon analysis [electronic resource] / S.R. Joshi and A. Mudroch. Burlington, Ont. : Environmental Contaminants Division, National Water Research Institute, Canada Centre for Inland Waters, [1986]. 15, [7] p. : ill., map NWRI contribution ; no. 86-183 "Division Control No. ECD-112". "This manuscript has been submitted to Nuclear Instruments and Methods and the contents are subject to change". Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "The levels of Pb-210 and Am-241 in sediments are normally measured by using complex chemical procedures which are both time consuming and require considerable dexterity in separation chemistry. The two radionuclides, however, also emit very low energy gamma rays which can be measured on a properly calibrated hyperpure germanium detector. The present paper describes the development of such a qamma-ray spectrometric technique. The technique is applied to assign dates to two sediment cores from the Great Slave Lake, NWT. The results are compatible with the dates derived from Cs-137 measurements"--Management perspective. Includes management perspective and abstract in French. gccst Water quality gccst Radioactivity Mudroch, Alena. Canada. Environment Canada. National Water Research Institute (Canada) NWRI contribution ; no. 86-183 (CaOODSP)9.844121 PDF 1.35 MB https://publications.gc.ca/collections/collection_2018/eccc/En13-5-86-183-eng.pdf