Production of high specific activity 27Mg by fast neutron irradiation and recoil-aided leaching
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B. Wierczinski
High specific activity 27Mg was produced via recoil-aided leaching from alumina in aqueous medium during irradiation with fast neutrons from a nuclear reactor. After irradiation the aqueous medium was passed through an IC-chelate column, the 24Na formed during irradiation was removed by elution with 0.25 ml · l-1 sodium acetate and subsequently the 27Mg was eluted with 2 mol · l-1 hydrochloric acid. Irradiation of alumina with a particle size of 3 μm and a specific surface area of 100 m2 · g-1 in Milli-Q Plus Water yielded 90% of the total 27Mg activity produced. Under standard conditions activities of about 8 · 105 Bq and specific activities of ca. 1013 Bq · mol-1 were obtained at the end of irradiation. The standard working conditions involved irradiation of 200 mg alumina dispersed in 0.5 ml liquid in a fast neutron flux of 3 · 1015 m-2 · s-1 for 15 min, a waiting time of 10 min, and a processing time of 15 minutes. Various alumina samples with different particle sizes and specific surfaces were tested, and the 27Mg yields were fitted to a mathematical function. Since the high leaching yields cannot only be explained by recoil only, other phenomena such as diffusion and leaching aided by the high hydration energy of the Mg2+ ion are probably involved.
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- Preface: Alfred P. Wolf Memorial Issue
- Im Memoriam Alfred P. Wolf
- The centenary of a controversial discovery: actinium
- Proton-induced nuclear reactions in neptunium-237 targets. Production of plutonium tracers in the energy range 15-40 MeV
- Possibility of production of 81Rb via the 80Kr(d,n) reaction at a small cyclotron
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- Production of high specific activity 27Mg by fast neutron irradiation and recoil-aided leaching
- Production of strontium-82 for the Cardiogen® PET generator: a project of the Department of Energy Virtual Isotope Center
- Lutetium-177-EDTMP for bone pain palliation. Preparation, biodistribution and pre-clinical studies
- Thermochromatographic separation of no-carrier-added 186Re or 188Re from tungsten targets relevant to nuclear medical applications
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- Novel separation of thallium-201 using p-tert-butylcalix[4]arene derivative
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- Doppler broadening as a probe of the chemical environment following oxygen-14 decay
- In-target chemistry during the production of 15O and 11C using 3He reactions
- 11C-methane production in small volume, high pressure gas targets
- 11C-methylations using 11C-methyl iodide and tetrabutylammonium fluoride
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- Effect of dissolved gas on the specific activity of N-13 labeled ions generated in water by the 16O(p,α)13N reaction
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