Results 161 to 170 of about 1,946 (206)
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A Critical Review of 55Fe Dosimetric Models
Health Physics, 1995The 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
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The production of 55Fe with medium-energy protons
International Journal of Radiation Applications and Instrumentation. Part A. Applied Radiation and Isotopes, 1992Abstract 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 +3 more
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55Fe in Pacific Ocean plankton
Marine Biology, 1977The 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 ...
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Uptake of ionic 55Fe by mouse peritoneal macrophages in vitro
Experimental Cell Research, 1975Abstract 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
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X-ray Diffraction using 55Fe Sources
Nature Physical Science, 1971LOBOV et al. have criticized1 our work2 on X-ray diffraction using a 55Fe source and modified Debye–Scherrer geometry. In particular, they have objected to our statement that 55Fe, which is reactor-produced by the (n, γ) reaction as was their source, is contaminated with 59Fe and 54Mn.
LUTHER E. PREUSS, WILLIAM S. TOOTHACKER
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Effects of 55Fe impurities on activity standardization of 59Fe
The International Journal of Applied Radiation and Isotopes, 1985Abstract During activity standardization of 59Fe by 4πβ−γ coincidence counting and efficiency extrapolation it was noted that at high counting efficiencies (when (1−e β )/e β ⪝ 0.09 from measurements of coincidences between s-rays and 1291 keV γ rays) 55Fe contamination shows up as a sudden change in the slope of the efficiency ...
Hiroshi Miyahara, Tamaki Watanabe
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Activity measurement of 55Fe by an efficiency calculation method
Applied Radiation and Isotopes, 1998Abstract A non-extrapolation method for 55Fe activity measurement based on liquid scintillation coincidence counting, is described. The figure-of-merit, P, describing the counting system is established by tracing internally with the γ-emitting radionuclide 54Mn, from which the detection efficiency corresponding to 55Fe is calculated. The technique is
B.R.S. Simpson, B.R. Meyer
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Određivanje 55Fe iz uzorka vode
2003Radom nuklearnih postrojenja nastaje niz radioizotopa bilo fisijskog ili aktivacijskog porijekla. Među tim izotopima je i 55Fe koji je aktivacijski produkt reakcije 54Fe(n, gama)55Fe. Taj izotop (izotop s niskom energijom) spada u treću skupinu radiotoksičnosti, a ako uđe u većim količinama u organizam može postati štetan za zdravlje (sastavni dio ...
Lulić, Stipe +2 more
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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 +7 more
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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 +7 more
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International comparison of activity measurements of a solution of 55Fe
Nuclear Instruments and Methods in Physics Research, 1982Abstract The Bureau International des Poids et Mesures organised an international comparison for the measurement of the radioactivity concentration of a 55Fe solution. The National Physical Laboratory was charged with the preparation and distribution of the solution and with the collation of the results.
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