Results 121 to 130 of about 1,186 (154)

Standardization and half-life measurement of 55Fe

Applied Radiation and Isotopes, 1998
Abstract 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, T.E. Sazonova, A.V. Zanevsky, S.V. Sepman   +3 more
openaire   +1 more source

Визначення вмісту 59Ni та 55Fe в конструкційних елементах АЕС

Ukrainian Journal of Physics, 2023
Проведено опромiнювання конструкцiйних матерiалiв 2-го блока ЧАЕС гальмiвними y-квантами з граничною енергiєю 37 МеВ. З вимiряних y-спектрiв, використовуючи спiввiдношення виходiв 57Co, 58Сo та 54Mn, ми визначили вiдношення концентрацiй iзотопiв 58Ni та 56Fe до концентрацiї 59Co.
V.O. Zheltonozhsky, D.E. Myznikov, A.M. Savrasov, V.I. Slisenko   +3 more
openaire   +1 more source

A direct method for 55Fe activity measurement

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1990
Abstract 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
openaire   +1 more source

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, H, Nakata, A, Tajima, K, Gruber, V, Acuff, C, Patlak, J, Fenstermacher   +6 more
openaire   +2 more sources

55Fe in Pacific Ocean plankton

Marine Biology, 1977
The specific activity of 55Fe in plankton increased from below detectable limits at 20°N to a maximum of 130 nCi/g Fe at 20°S and then decreased to 5 nCi/g Fe at 50°S. Along an east-west track near 15°S a peak of 90 nCi/g Fe occurred at 135°W. It is suggested that this maximum is the result of fallout from French nuclear tests at Mururoa Atoll (22°S ...
openaire   +1 more source

TDCR measurements to determine the half-life of 55Fe

Applied Radiation and Isotopes, 2020
Several 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.
openaire   +2 more sources

A Critical Review of 55Fe Dosimetric Models

Health Physics, 1995
The available literature on 55Fe dosimetry has been devoted to environmental exposures and medical iron kinetic studies. For occupational dosimetry, ICRP (1979, 1988) published a non-recycling dosimetric model for iron. These ICRP publications do not provide information on iron excretion. Johnson and Dunford (1985) published dose conversion factors and
openaire   +2 more sources

Energy levels, decay scheme, γ-ray branching ratios and lifetimes in 55Fe from the 55Mn(p, nγ)55Fe reaction

Nuclear Physics A, 1984
Abstract The reaction 55 Mn(p, nγ) 55 Fe has been studied at E p = 4.0 and 6.0 MeV using a pulsed beam. From the experiments at 6.0 MeV, the energy levels of 55 Fe up to an excitation of 3810 keV, their decay scheme and the γ-ray branching ratios have been determined. Levels have been identified for the first time in the (p, nγ) reaction.
M. Khaliquzzaman, W.K. Dawson, H.W. Fielding, P.W. Green, R.L. Helmer, W.J. McDonald, G.C. Neilson, D.M. Sheppard   +7 more
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Uptake of ionic 55Fe by mouse peritoneal macrophages in vitro

Experimental Cell Research, 1975
Abstract Mouse peritoneal macrophages were maintained in vitro up to 3 days and exposed to radiolabelled 55 Fe in the form of ferrous citrate, ferrous sulfate, and ferric chloride in concentrations of 3–5 γ Fe/ml. The divalent iron compounds were taken up 10–40 times more extensively per weight of iron than the trivalent iron compounds.
M E, Fedorko, C, Lanni
openaire   +2 more sources

The production of 55Fe with medium-energy protons

International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1992
Abstract Thick-target production rates of 55Fe produced in the proton bombardment of Mn, Co and Ni were investigated from threshold up to 100 MeV. Impurity levels of the only radiocontaminant of importance, 59Fe, were also considered. It is shown that the optimum production rate at energies above ∼ 35 MeV will be achieved by utilizing a tandem Mn/Ni ...
G.F. Steyn, B.R.S. Simpson, S.J. Mills, F.M. Nortier   +3 more
openaire   +1 more source