منابع مشابه
EPR of Uranium. Ions
Actinides, the last known group of the Periodic Table are the subject of a special interest, both practical and scientific. Though their use is mainly based on their unique nuclear properties, the electronic structure is of no little interest because it is of paramount importance in determining the physical and chemical properties of the actinides and their compounds. Despite the common tendenc...
متن کاملGas-Phase Reactions of Bare and Ligated Uranium Ions with Sulfur Hexafluoride
Reactions of bare and ligated uranium ions with sulfur hexafluoride were studied in a quadrupole ion trap mass spectrometer. Bare U+ was found to react rather efficiently with SF6 (k/kADO ∼ 0.4) to produce both UFn (n ) 1, 2, 3, 4) and SFn (n ) 1, 2, 3). Whereas the UF/SF6 reaction rate was essentially the same as that for U/SF6, both UF2 and UF3 were inert; this is attributed to a repulsive in...
متن کاملapplication and construction of carbon paste modified electrodes developed for determination of metal ions in some real samples
ساخت الکترودهاِی اصلاح شده ِیکِی از چالشهاِی همِیشگِی در دانش شیمِی بوِیژه شیمِی تجزیه مِی باشد ،که با در نظر گرفتن سادگِی ساخت، کاربردی بودن و ارزان بودن روش مِی توان به باارزش بودن چنِین سنسورهاِی پِی برد.آنچه که در ادامه آورده شده به ساخت و کاربرد الکترودهاِی اصلاح شده با استفاده از نانو ذرات در اندازه گِیرِی ولتامترِی آهن وکادمِیم اشاره دارد. کار اول اختصاص دارد به ساخت الکترود خمِیر کربن اصلاح شده با لِیگاند داِ...
15 صفحه اولAlpha-recoil thorium-234: dissolution into water and the uranium-234/uranium-238 disequilibrium in nature.
The rate of ejection of alpha-recoil thorium-234 into solution from the surface of zircon sand gives an alpha-recoil range of 550 angstroms. The alpha-recoil thorium-234 atoms ejected into the groundwater may supply excess uranium-234. In pelagic sediments, ejected alpha-recoil thorium-234 may contribute to the supply of mobile uranium-234 in the sedimentary column.
متن کاملDegradation of polyethylene oxides during irradiation with uranium ions
This project focuses on polyepoxides used in glass fiber reinforced polymer (GFRP) compounds, to be applied as insulators or structure-support materials for magnets of the future FAIR facility. As such, polyepoxides have to withstand high radiation levels of X-rays, gammas, neutrons, protons, and heavier particles [1]. Radiation hardness tests are important in order to estimate lifetimes and pe...
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ژورنال
عنوان ژورنال: Physical Review
سال: 1958
ISSN: 0031-899X
DOI: 10.1103/physrev.112.543