Results 151 to 160 of about 1,946 (206)
Applied Radiation and Isotopes, 2006 The half-life of 55Fe was determined experimentally and compared with literature values. A solid 55Fe source was prepared by electrodeposition and repeatedly measured in an X-ray detector at a constant, low solid angle. In total, more than six hundred measurements were performed over a period of ten months, corresponding to one third of the half-life ...
R, Van Ammel, S, Pommé, G, Sibbens
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Accurate measurement of 55Fe in radioactive waste
Journal of Radioanalytical and Nuclear Chemistry, 2020A radiochemical method was developed for the accurate 55Fe determination in various radioactive waste, in particular samples contaminated with 241Pu. It consisted of three purification steps based on first ammonium hydroxide precipitation, and then anion exchange separation followed by TRU®-based extraction chromatography.
Celine Gautier +2 more
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Quantitative autoradiographic assessment of 55Fe-RBC distribution in rat brain
Journal of Applied Physiology, 1990 A simple in vivo technique of labeling erythrocytes (RBCs) with 55Fe was developed for quantitative autoradiography (QAR). This procedure involved injecting 5-6 ml of [55Fe]ferrous citrate solution (1 mCi/ml) intraperitoneally into donor rats. The number of labeled RBCs reached a maximum at around 7 days and declined very slowly thereafter.
S Z, Lin +6 more
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Determination of 55Fe in urine by liquid scintillation counting
Journal of Radioanalytical and Nuclear Chemistry, 2015A new method has been developed to measure Iron-55 (55Fe) in urine samples, which could be used for dose assessment of 55Fe in an accidental exposure. 55Fe was effectively precipitated from 1 litre of urine by bringing the sample to 2M NaOH. Potential interferences for 55Fe (e.g., Cr, Co, Ni, Mn, Zn and Mo) were removed by anion exchange chromatography.
Nicolas Guerin +2 more
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FEMS Microbiology Letters, 2012 Heterotrophic bacteria are key players in the biogeochemical cycle of iron (Fe) in the ocean, but the capability of different bacterial groups to access this micronutrient is ignored thus far.
Marion Fourquez +2 more
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Nuclear Physics A, 1972
Abstract A number of low-lying levels in 55 Fe have been described as hole states. The lifetime of the first two hole states has been measured using the direct-timing and Doppler-shift techniques, and the decay scheme of these and neighbouring levels measured.
B.C. Robertson +2 more
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Abstract A number of low-lying levels in 55 Fe have been described as hole states. The lifetime of the first two hole states has been measured using the direct-timing and Doppler-shift techniques, and the decay scheme of these and neighbouring levels measured.
B.C. Robertson +2 more
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A direct method for 55Fe activity measurement
International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1990Abstract A simple, direct method for the determination of 55 Fe activity using liquid scintillation counting is described. The method is based on the theoretical calculation of counting efficiencies and does not make use of efficiency tracing or extrapolation.
B.R. Meyer, B.R.S. Simpson
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TDCR measurements to determine the half-life of 55Fe
Applied Radiation and Isotopes, 2020Several measurements with aliquots from a 55Fe solution were carried out using two custom-built TDCR counters. The time between the initial and the last measurements is 2304 d, i.e. a length of more than two half-lives. The data were analysed to determine the half-life of 55Fe, which was found to be (1006.2 ± 1.0) d.
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Standardization and half-life measurement of 55Fe
Applied Radiation and Isotopes, 1998Abstract Methods for measurement of the specific activity and the KX-ray emission rate per 1 g of a 55 Fe solution are described. The emission rate was determined by a pressurized proportional 4 π -counter with an uncertainty of 0.3% and absorption and self-absorption corrections were determined experimentally for each source.
N.I. Karmalitsyn +3 more
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Diffusion of 55Fe in Fe2O3 single crystals
Journal of Physics and Chemistry of Solids, 1985Abstract The diffusion of 55 Fe has been measured parallel to the c axis of Fe 2 O 3 single crystals at temperatures in the range 708–1303°C and at an oxygen activity of unity. The tracer penetration profiles were determined using sectioning techniques. For temperatures above 900°C the tracer diffusion coefficient is given by D ∗ (Fe) = 1.6 × 10
A. Atkinson, R.I. Taylor
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