Tantalum-178--a short-lived nuclide for nuclear medicine: production of the parent W-178.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine (1978-05-01)
B L Holman, G I Harris, R D Neirinckx, A G Jones, J Idoine
PMID641573
RESUMO

The physical decay characteristics of the short-lived radionuclide Ta-178 (half-life 9.3 min) appear to be suitable for use in conjunction with low-energy detection systems such as the multiwire proportional camera. This camera is inefficient for emissions with energies greater than 100 keV. The gamma-ray spectrum of Ta-178 is dominated by the characteristic hafnium x-rays (55--65 keV), emitted as a result of electron-capture decay. The parent nuclide, W-178 (half-life 21.7 d), was produced in the Michigan State University cyclotron by proton bombardment of stacked natural tantalum-foil targets. Optimum production was found to occur with an incident proton energy of 34 MeV at an effective activity of 1.1 mCi/muA-hr per MeV of target thickness. Tungsten-178 was chemically separated from the Ta foils with a yield of 98%.

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Tantalum, foil, 10mm disks, thickness 0.05mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.075mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.100mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.125mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.15mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.20mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.25mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.25mm, annealed, 99.99%
Tantalum, foil, 10mm disks, thickness 0.5mm, annealed, 99.9%
Tantalum, foil, 10mm disks, thickness 0.75mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.006mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.0075mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.009mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.0125mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.015mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.01mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.025mm, as rolled, 99.9%
Tantalum, foil, 15mm disks, thickness 0.02mm, 99.9%
Tantalum, foil, 15mm disks, thickness 0.034mm, as rolled, 99.9%
Tantalum, foil, 15mm disks, thickness 0.03mm, as rolled, 99.9%
Tantalum, foil, 15mm disks, thickness 0.05mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.075mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.100mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.125mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.15mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.20mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.25mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.25mm, annealed, 99.99%
Tantalum, foil, 15mm disks, thickness 0.5mm, annealed, 99.9%
Tantalum, foil, 15mm disks, thickness 0.75mm, annealed, 99.9%

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