Technologie zur Aktivierung gepreßter Targetmaterialien mit dem Protonenstrahl (12 MeV, 10 µA) des Zyklotrons U-120
Technologie zur Aktivierung gepreßter Targetmaterialien mit dem Protonenstrahl (12 MeV, 10 µA) des Zyklotrons U-120
Thümmel, H.-W.; Brückner, R.; Guratzsch, H.
The technology described has been developed for safe activation of pressed powder materials (up to 500 mg) in a proton beam (10 µA). The procedure has been optimized for the production of 94mTc with the Rossendorf U-120 cyclotron using enriched 94MoO3. The target material is irradiated inside an evacuated and pressure controlled tar-getholder equipped with a thin entrance window for the proton beam. The target with-stands an absorbed beam power of about 40 W as the result of a good heat coupling between the target material and the water-cooled target holder as well as the helium-cooled entrance window. In the case of a window break the closed helium circuit pre-vents the escape of radioactivity. To diminish the energy absorption in the target the thickness is adapted to the distribution of the cross section. After taking the target holder out of the irradiation equipment, the target remains closed in the target holder ...
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Wissenschaftlich-Technische Berichte / Forschungszentrum Rossendorf; FZR-265 Juli 1999
ISSN: 1437-322X
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