Results 211 to 220 of about 2,026 (243)
Some of the next articles are maybe not open access.
Plutonium and cesium isotopes in river waters in Japan
Journal of Radioanalytical and Nuclear Chemistry Articles, 1990Concentrations of cesium isotopes and plutonium in river water samples in Japan, collected during the period from June 1985 to February 1987, have been measured. The total137Cs concentrations in the Japanese river waters ranged from 0.063 to 1.89 mBq·l−1. The portion of particulate137Cs to total was observed to be less than 10 to 35%.
K. Hirose, M. Aoyama, Y. Sugimura
openaire +1 more source
Cesium isotope ratios as indicators of nuclear power plant operations
Journal of Environmental Radioactivity, 2011There are multiple paths by which radioactive cesium can reach the effluent from reactor operations. The radioactive (135)Cs/(137)Cs ratios are controlled by these paths. In an effort to better understand the origin of this radiation, these (135)Cs/(137)Cs ratios in effluents from three power reactor sites have been measured in offsite samples.
James E, Delmore +3 more
openaire +2 more sources
Cesium, americium and plutonium isotopes in ground level air of vilnius
Czechoslovak Journal of Physics, 2006Systematic observations of radionuclide composition and concentration in the atmosphere have been carried out at the Institute of Physics in Vilnius since 1963. Increases in activity concentration of radionuclides in the atmosphere were observed after nuclear weapon tests and the Chernobyl NPP accident.
G. Lujaniene +5 more
openaire +1 more source
Diffusion and isotope effects in the diffusion of homovalent cations in cesium iodide
Physical Review B, 1988Preexponentials ${D}_{0}$ and activation energies Q for self-diffusion and diffusion of homovalent cations of small radius in single crystals of CsI measured by the tracer sectioning method are as follows: for $^{137}\mathrm{Cs}$, 19\ifmmode\pm\else\textpm\fi{}1.5 ${\mathrm{cm}}^{2}$ ${\mathrm{s}}^{\mathrm{\ensuremath{-}}1}$ and 35.59\ifmmode\pm\else ...
, Klotsman +3 more
openaire +2 more sources
An isotope dilution–precipitation process for removing radioactive cesium from wastewater
Journal of Hazardous Materials, 2012A novel isotope dilution-precipitation method has been developed to remove cesium-137 from radioactive wastewater. The process involves adding stable cesium chloride to wastewater in order to raise the total cesium concentration, which then allows both the stable and radioactive cesium ions to be precipitated together using sodium tetraphenylborate ...
Harold, Rogers +2 more
openaire +2 more sources
Radioactive and stable cesium isotope distributions and dynamics in Japanese cedar forests
Journal of Environmental Radioactivity, 2018Dynamics of the Fukushima-derived radiocesium and distribution of the natural stable isotope 133Cs in Japanese cedar (Cryptomeria japonica D. Don) forest ecosystems were studied during 2014-2016. For the experimental site in Yamakiya, Fukushima Prefecture, we present the redistribution of radiocesium among ecosystem compartments during the entire ...
Vasyl Yoschenko +8 more
openaire +2 more sources
Relativistic mean-field theory on the xenon, cesium and barium isotopes
Nuclear Physics A, 1995Abstract We apply the relativistic mean-field theory to unstable nuclei with Z = 54, 55 and 56. We compare the results of calculations to experimental data of the mean-square-charge radii and binding energies using the parameter set, TM1. The constraint calculations results in an energy curve as a function of deformation with several candidates for ...
D. Hirata, H. Toki, I. Tanihata
openaire +1 more source
Accelerator mass spectrometry of cesium isotopes
2015Accelerator Mass Spectrometry (AMS) is a highly sensitive method to determine isotopic ratios in natural samples down to extremely low levels of about 10−15. The challenge in measuring the cesium isotopes 135Cs and 137Cs is the isobaric interference of barium. Naturally occurring abundances are estimated to (135,137Cs)/133Cs=10−11. This thesis presents
openaire +1 more source
Analytical Chemistry, 2006
A procedure for the automated determination of isotopic abundances of silicon from biogenic and lithogenic particulate matter and from dissolved silicon in fresh or saltwaters is reported. Samples are purified using proven procedures through the reaction of Si with acidified ammonium molybdate, followed by precipitation with triethylamine and ...
Mark A, Brzezinski +4 more
openaire +2 more sources
A procedure for the automated determination of isotopic abundances of silicon from biogenic and lithogenic particulate matter and from dissolved silicon in fresh or saltwaters is reported. Samples are purified using proven procedures through the reaction of Si with acidified ammonium molybdate, followed by precipitation with triethylamine and ...
Mark A, Brzezinski +4 more
openaire +2 more sources
Efficiency measurements of the isotope separation with a cesium ion source
Nuclear Instruments and Methods, 1965Abstract The radioactive cesium isotopes are to be separated for an optical determination of the isotope shift of the spectral lines. In order to reduce contamination, the losses in the different parts of the machine were investigated. By using a surface ionization source currents up to 12 μA at 20 kV were obtained at the collector with an overall ...
openaire +1 more source