00000nam 2200000zi 4500 9.868079 CaOODSP 20241203113645 m o d f cr nn||||||||| 190207s1988 onc o f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- En13-5/87-92E-PDF Joshi, S. R. (Sewak Ram) author. Detection of fallout 155Eu and 207Bi in a 210Pb-dated lake sediment core / S.R. Joshi and R. McNeely. Burlington, Ontario : Lakes Research Branch, National Water Research Institute, Canada Centre for Inland Waters, 1988. 1 online resource (13 pages, 8 unnumbered pages) text txt rdacontent computer c rdamedia online resource cr rdacarrier NWRI contribution ; 87-92. "January 1988." Cover title. "Division control no. LRB/88." "This manuscript has been submitted to the Journal of Radionalaytical and Nuclear Chemistry and the contents are subject to change. This copy is to provide information prior to publication." Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references. "This title radionuclides are produced in nuclear weapons' testing in varying amounts. Their modes of formation are as yet not clearly defined. We report the FIRST detection of both these radionuclides in a freshwater lake, McKay Lake in Ottawa, using high-resolution low-energy gamma-ray spectroscopy for Bi-207. We could trace Eu-155 back to mid 1960's. By comparing the fission yields with Cs-137, we propose that Eu-155 is formed via simple thermal neutron fission of U-235 and discount an earlier suggestion that it is formed via fast neutron fission in U-238"--Management perspective/Executive summary. Includes a management perspective/Executive summary in English and French. gccst Geology McNeely, R., author. Canada. Environment Canada. National Water Research Institute (Canada). Lakes Research Branch. NWRI contribution ; 87-92. (CaOODSP)9.844121 PDF 1.12 MB https://publications.gc.ca/collections/collection_2019/eccc/en13-5/En13-5-87-92-eng.pdf