Cross section data for the production of the positron emitting niobium isotope 90Nb via the 90Zr(p, n)-reaction
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S. Busse
Summary
The radioisotope 90Nb decays with a positron branching of 53% and a relatively low β+-energy of Emean = 0.66 MeV and Emax = 1.5 MeV. Its half-life of 14.6 h makes it especially promising for quantitative investigation of biological processes with slow distribution kinetics using positron emission tomography. To optimise its production, the excitation functions of 90Zr(p, xn)-processes were studied over the proton energy range of 7.5 to 19 MeV via the stacked-foil technique using both natZr and 99.22% enriched 90ZrO2 as targets. Thick target yields of 90Nb were calculated from the measured excitation functions and were verified experimentally. The optimum energy range for the production of 90Nb via the 90Zr(p, n)-process was found to be Ep = 17 → 7 MeV, with a yield of 600 MBq 90Nb/µA h. The yield and radionuclidic purity of 90Nb over the energy range of Ep = 17.6 → 8.1 MeV were determined experimentally using natZr. At 4 h after EOB the yield of 90Nb was found to be 290 MBq/µA h and its radionuclidic purity ≥ 95%.
© Oldenbourg Wissenschaftsverlag, München
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Artikel in diesem Heft
- Cross section data for the production of the positron emitting niobium isotope 90Nb via the 90Zr(p, n)-reaction
- Transuranic elements determination in spanish NPP-wastes on the basis of gross alpha activity
- A comparative evaluation of synergistic extraction behaviour of hexavalent uranium with thenoyl tri-fluoro-acetone (HTTA) and 1-phenyl, 3-methyl, 4-benzoyl pyrazolone-5 (HPMBP) using mono-functional and bi-functional neutral donors
- Transport of Th(IV) and U(VI) through barium silico-phosphate composite membrane using electric field
- Evaluation of the complexation behavior between humic acid and UO22+ with fluorescence spectroscopy and its mixture analysis
- Investigation of sorption of Tb(III) by 2-thenoyltrifluoroacetone supported onto polyurethane foam
- Selective carrier-mediated cesium transport through polymer inclusion membranes by calix[4]arene-crown-6 carriers from complex aqueous mixtures
- Adsorption studies of zinc ions on barium titanate from aqueous solution
- The enrichment of magnesium isotopes by AM15C5 bonded ion exchanger
