Browsing ELibrary by Subject "SAMARIUM"
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Browsing ELibrary by Subject "SAMARIUM"
Now showing items 1-6 of 6
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(2006)We provide new estimates for the abundance of heat-producing elements in the lunar mantle by using SIMS techniques to measure the concentrations of thorium and samarium in lunar pyroclastic glasses. Lunar pyroclastic glasses ...
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(1999)Large isotopic deviations of 149Sm-150Sm and 157Gd-158Gd derived from neutron capture effects were observed in five enstatite achondrites (aubrites); Norton County, ALH78113, Cumberland Falls, Bishopville and Mayo Belwa. ...
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(2000)Isotopic compositions of Sm and Gd in eight chondrites (Mezo-Madaras, Parnallee, Otis, Suizhou, Zhaodong, Allende, Bruderheim and Y-74191) were measured to study neutron capture effects due to the interaction of cosmic ...
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(2001)The bombardment of the lunar surface by cosmic rays produces secondary neutrons, some of which are thermalized by the lunar soil and then interact strongly with the isotopes of Cd, Gd and Sm which have high neutron capture ...
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(2006)Enstatite achondrites (aubrites) when compared to other stone meteorites have unusually long cosmic-ray exposure (CRE) ages. We report here the 150Sm/149Sm and 158Gd/157Gd ratios in six different structural phases, i.e., ...
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(2004)Роль максиминералов в качестве носителей Nd и Sm в верхней части континентальной коры определена по модели А.Б. Ронова и др. (1990). Расчет выполнен на основе больше чем 3416 количественных минералогических анализов важнейших ...
Now showing items 1-6 of 6