Results 251 to 260 of about 14,752 (295)
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Physical Review, 1938
Radioactive ${\mathrm{Fe}}^{59}$ has been produced through the reactions ${\mathrm{Fe}}^{58}(d, p){\mathrm{Fe}}^{59}$ and ${\mathrm{Co}}^{59}(n, p){\mathrm{Fe}}^{59}$; the half-life is 47\ifmmode\pm\else\textpm\fi{}3 days. The emitted particles are negative electrons, most of which have a range of 0.09 grams/${\mathrm{cm}}^{2}$ Al, while a small number
J. J. Livingood, G. T. Seaborg
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Radioactive ${\mathrm{Fe}}^{59}$ has been produced through the reactions ${\mathrm{Fe}}^{58}(d, p){\mathrm{Fe}}^{59}$ and ${\mathrm{Co}}^{59}(n, p){\mathrm{Fe}}^{59}$; the half-life is 47\ifmmode\pm\else\textpm\fi{}3 days. The emitted particles are negative electrons, most of which have a range of 0.09 grams/${\mathrm{cm}}^{2}$ Al, while a small number
J. J. Livingood, G. T. Seaborg
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Earth and Planetary Science Letters, 2006 Core formation in planetesimals can, in principle, be dated using the short-lived 182Hf-182W chronometer. However, it has been predicted that burnout and production of W isotopes by nuclear reactions can substantially modify the compositions in iron ...
Ingo Leya, A Halliday, Rainer Wieler
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Isotopic Fingerprints of Iron–Cyanide Complexes in the Environment
Environmental Science & Technology, 2016Tracing the origin of iron-cyanide complexes in the environment is important because these compounds are potentially toxic. We determined the stable isotopic compositions of cyanide-carbon (CCN) and cyanide-nitrogen (NCN) in 127 contaminated solids and 11 samples of contaminated groundwater from coal carbonization sites, blast furnace operations, and ...
Mansfeldt, Tim, Höhener, Patrick
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Natural Iron Isotope Variations in Human Blood
Science, 2002Isotopic analysis of human blood and liver and muscle tissue indicates that each individual bears a long-term iron (Fe) isotope signature in the blood. Blood and tissue differ slightly in isotopic composition and are depleted by up to 2.6 per mil in 56 Fe relative to 54 Fe when compared to ...
Walczyk, T., von Blanckenburg, F.
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Oxygen Isotope Variation in Stony-Iron Meteorites
Science, 2006Asteroidal material, delivered to Earth as meteorites, preserves a record of the earliest stages of planetary formation. High-precision oxygen isotope analyses for the two major groups of stony-iron meteorites (main-group pallasites and mesosiderites) demonstrate that each group is from a distinct asteroidal source.
Greenwood, R.C. +4 more
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Nature, 1936
IT was shown by Fermi and co-workers1 that the activity induced in iron by neutron bombardment is due to an isotope of manganese. The isolation of an active iron isotope has not been reported. By means of the sensitive tube counter outfit2 in this institute, it was found that active iron can be isolated from cobalt which has been irradiated with ...
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IT was shown by Fermi and co-workers1 that the activity induced in iron by neutron bombardment is due to an isotope of manganese. The isolation of an active iron isotope has not been reported. By means of the sensitive tube counter outfit2 in this institute, it was found that active iron can be isolated from cobalt which has been irradiated with ...
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Biogeochemical Cycling of Iron Isotopes
Science, 2005Iron is the most abundant element on Earth that undergoes reduction-oxidation (redox) reactions. Moreover, the ratio of the iron isotopesFe andFe can change during these redox reactions. As Johnson and Beard discuss in their Perspective, this isotope fractionation has attracted interest as a way of understanding important biogeochemical ...
Clark M. Johnson, Brian L. Beard
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Isotope resolution of the iron peak
Nuclear Instruments and Methods, 1977Abstract A stack of Lexan detectors from the Apollo 17 mission has been analyzed to obtain Z measurements of sufficient accuracy to resolve the iron peak into its isotopic components. Within this distribution several peaks are present. With the centrally located, most populated peak assumed to be 56Fe, our measurements imply that the abundances of ...
R.P. Henke, E.V. Benton
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Journal of Radioanalytical Chemistry, 1980
The natural relative abundance of iron-58 has been determined by neutron activation analysis using Fe2O3 enriched in the isotope as comparator standard. The value obtained is 0.280∓0.003%. This result, while confirming a recent work, differs significantly from that listed by most commonly used reference tabulations.
W. D. James, J. J. Carni
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The natural relative abundance of iron-58 has been determined by neutron activation analysis using Fe2O3 enriched in the isotope as comparator standard. The value obtained is 0.280∓0.003%. This result, while confirming a recent work, differs significantly from that listed by most commonly used reference tabulations.
W. D. James, J. J. Carni
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2013
Iron is the most abundant element in the Earth and the 4th most abundant in the crust and mantle; Fe is involved in every stage of planetary formation and differentiation. Iron isotope ratios are robust process tracers used to understand the origin of the Solar System, planetary formation, and differentiation processes such as the moon-forming giant ...
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Iron is the most abundant element in the Earth and the 4th most abundant in the crust and mantle; Fe is involved in every stage of planetary formation and differentiation. Iron isotope ratios are robust process tracers used to understand the origin of the Solar System, planetary formation, and differentiation processes such as the moon-forming giant ...
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