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Author Sahoo, S. K.
Source IACS Kolkata
Content type Text
Publisher Indian J. Phys.
File Format PDF
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Physics
Subject Keyword Soil ♦ 234U ♦ 235U ♦ 236U ♦ 238U ♦ DU ♦ ICP-MS ♦ TIMS
Abstract Actinides have widely entered the environment as a result of nuclearaccidents and atmospheric weapon testing. These radionuclides, especially uranium,are outstanding radioactive pollutants, due to their high radiotoxicity and longhalf-lives. In addition to this, since depleted uranium (DU) has been used in theBalkan conflict in 1999, there has been a concern about the possible consequences ofits use for the people and environment. Therefore, accurate, precise and simpledetermination methods are necessary in order to evaluate the human dose and theconcentration and effects of these nuclides in the environment. The principalisotopes of uranium e.g.235U and 238U are of primordial origin and 234U present inradioactive equilibrium with 238U. 236U occurs in nature at ultra traceconcentrations with a 236U : 238U atom ratio of 10–14. Concentrations of uranium insoil samples were determined using inductively coupled plasma mass spectrometry(ICP-MS) and isotope ratios of uranium were measured using a thermal ionisation massspectrometer. Radioactive dis-equilibrium of 234U.238U, depletion of 235U.238U andsignificant evidence of 236U.238U were noticed in soil samples.
Education Level UG and PG
Learning Resource Type Article
Journal Indian J Phys
Volume Number 83
Issue Number 6
Page Count 11
Starting Page 787
Ending Page 797