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Showing 1 to 6 of 6 for “"Protactinium"”.
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The marine geochemistry of thorium and protactinium
… rates to areas of high scavenging rates. Protactinium is redistributed to a greater extent than Th. Fluxes of 230Th can be used to set lower limits for horizonttal transport of Pa even when absolute trapping efficiencies of the sediment traps are not known. Less than 50% of the Pa produced …
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The marine geochemistry of thorium and protactinium
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.
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Spin-lattice relaxation of tetravalent protactinium in a cubic crystal
Restriction data tranferred 2014-07-01T11:12:54-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis
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Marine thorium and protactinium distributions: Tools for past and present chemical flux
Adsorption to sinking particulate matter, known as scavenging, is an important yet elusive term in the budgets of many bioactive and contaminant trace metals in the ocean. Scavenging is also involved in the cycling of other trace metals used in ocean sediments to learn about ocean processes, such …
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Variations in the particulate flux of ²³⁰Th and ²³¹Pa and paleoceanograhpic applications of the ²³¹Pa/²³¹Th ratio
… New analytical methods for uranium, thorium, and protactinium isotopes by Inductively-Coupled Plasma Spectrometry (ICP-MS) with a conventional Meinhard concentric glass nebulizer were developed. Composite samples from sediment traps deployed a year or longer in diverse geographic regions of the …
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Studies of Used Fuel Fluorination and U Extraction Based on Molten Salt Technology for Advanced Molten Salt Fuel Fabrication
… FLiTh, to simulate irradiated Th that decays to protactinium (Pa). A constant, albeit small current, was used to deposit U on a W electrode without Th depositing with it. A liquid metal bismuth (Bi) electrode was used as well, and a constant current resulted in Th depositing with the U. To get …