Novel method to produce 109Cd via proton irradiation of electroplated silver on a gold-coated copper backing
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Z. Gholamzadeh
Abstract
Silver electrodeposition on gold layer was carried out by the alkaline plating baths to produce cadmium-109 via natAg(p, n)109Cd nuclear reaction. Gold was electrodeposited on copper backing in the beginning; the bath content consisted of 17.7 gl−1 KCN, 6.6 gl−1 Au, 6.6 gl−1 K2CO3 and 3.3 gl−1 Na2CO3 while acidity and temperature of the bath adjusted at 10 and 45°C respectively. A DC current density of ca 2.08 mA · cm−2 was used to electroplate gold. A gold layer of 63 μm thickness with suitable morphology was obtained after the electrodeposition. Silver was electrodeposited on the gold layer with 100% efficiency using a cyanide bath. The silver target was irradiated with 15 MeV proton beam and current of 150 μA; the 109Cd production yield was 2.0 μCi/μA · h (0.074 MBq/μA · h). The target material was dissolved by 14 M HNO3. Cadmium-109 in the dissolved target solution was separated from silver by evaporation process. Cadmium recovered with more than 88% efficiency involved non-detected silver impurity.
Kurzfassung
Elektrodeposition von Silber auf einer Goldschicht wurde durchgeführt mit Hilfe von alkalischen Plattierungsbädern um so Cadmium-109 über die KernreaktionnatAg(p, n)109Cd zu erzeugen. Zuerst wurde Gold auf einem Kupferträger aufgebracht; das Bad bestand aus 17,7 gl−1 KCN, 6,6 gl−1 Au, 6,6 gl−1 K2CO3 und 3,3 gl−1 Na2CO3, der Säuregrad wurde bei 10 und die Temperatur bei 45°C gehalten. Eine Gleichstromdichte von 2,08 mA · cm−2 wurde verwendet zur Goldbeschichtung. Man erhielt eine Goldschicht von 63 μm Dicke mit geeigneter Morphologie. Mit Hilfe eines Zyanidbads wurde die Goldschicht mit Silber beschichtet mit einer Efficiency von 100%. Das Silbertarget wurde bestrahlt mit 15 MeV Protonen und einem Strom von 150 μA; die 109Cd Ausbeute lag bei 2,0 μCi/μA · h (0,074 MBq/μA · h). Das Targetmaterial wurde in 14 M HNO3 gelöst. Cadmium-109 in der Targetlösung wurde von Silber durch ein Verdampfungsverfahren getrennt. Das mit mehr als 88% Efficiency gewonnene Cadmium enthielt nicht-nachweisbare Silberverunreinigungen.
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© 2011, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- Stress analyses for reactor pressure vessels by the example of a product line '69 Boiling Water Reactor
- Multiple condensation induced water hammer events, experiments and theoretical investigations
- Simulation of load following mode of operation for a natural circulation pressure tube type BWR
- CANDU fuel elements behaviour in the load following tests
- Local heat transfer coefficient near the spacer grids
- Best estimate analysis of PHEBUS FPT1 experiment bundle phase using ASTEC code ICARE module
- Investigations of bi-directional flow behaviour in presence of a large vertical opening in a fire compartment
- CANDU reactors with reactor grade plutonium/thorium carbide fuel
- Novel method to produce 109Cd via proton irradiation of electroplated silver on a gold-coated copper backing
- Technical Notes/Technische Mitteilungen
- Atmospheric dispersion of accidental release of radioactive gases from high enriched and low enriched fuel of Miniature Neutron Source Reactors (MNSR)
- Fuel burnup of modified fuel assembly configurations for a small medical reactor
- Determination of natural uranium, thorium and radium isotopes in water and soil samples by alpha spectroscopy
Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- Stress analyses for reactor pressure vessels by the example of a product line '69 Boiling Water Reactor
- Multiple condensation induced water hammer events, experiments and theoretical investigations
- Simulation of load following mode of operation for a natural circulation pressure tube type BWR
- CANDU fuel elements behaviour in the load following tests
- Local heat transfer coefficient near the spacer grids
- Best estimate analysis of PHEBUS FPT1 experiment bundle phase using ASTEC code ICARE module
- Investigations of bi-directional flow behaviour in presence of a large vertical opening in a fire compartment
- CANDU reactors with reactor grade plutonium/thorium carbide fuel
- Novel method to produce 109Cd via proton irradiation of electroplated silver on a gold-coated copper backing
- Technical Notes/Technische Mitteilungen
- Atmospheric dispersion of accidental release of radioactive gases from high enriched and low enriched fuel of Miniature Neutron Source Reactors (MNSR)
- Fuel burnup of modified fuel assembly configurations for a small medical reactor
- Determination of natural uranium, thorium and radium isotopes in water and soil samples by alpha spectroscopy
