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R.H. Higgy

Natural radionuclides and plutonium isotopes in soil and shore sediments on Alexandria Mediterranean sea coast of Egypt

The specific activities of ²³⁸U, ²³²Th and ⁴⁰K in soil and shore sediments from the Mediterranean Sea Coast of Alexandria have been determined using direct gamma spectrometry with a HP-Ge detector and absorbed dose rates in air were calculated. The specific activity of ²³⁸U was determined by laser fluorimetry after applying a radiochemical separation. The specific activities of ²³⁸U, ²³⁵U, ²³⁴U, ²³⁸Pu and ^239+240Pu were determined using an alpha spectrometer based on surface barrier detectors after applying sensitive radiochemical procedures. The specific activities of ²³⁸U obtained by the three techniques were compared. The isotopic ratios ²³⁴U/²³⁸U and ²³⁸Pu/^239+240Pu were calculated for evaluation of the geochemical behavior of the nuclides. Plutonium concentrations were compared with some reported values in other different marine ecosystems.

Radiochimica Acta, Oldenbourg Wissenschaftsverlag

Print ISSN: 0033-8230
Volume: 88, 01/2000
Pages: 047

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