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Browsing by Author "Ochab, Ewa"

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    Cyclotron Production, Separation and Quality Control of 73As
    (Institute of Nuclear Physics Polish Academy of Sciences, 2004) Bartyzel, Mirosław; Kłos, Małgorzata; Misiak, Ryszard; Ochab, Ewa; Petelenz, Barbara
    The isotope 73As has been produced on the AIC-144 cyclotron via the natGe(p,xn)73As nuclear reaction. The high purity germanium target of natural isotopic abundance was bombarded by the internal proton beam. The target was dissolved in aqua regia, and the As isotopes were separated on the Dowex-1 ion-exchange resin. The contaminant 74As was let to decay. Traces of stable germanium in the final product were determined spectrophotometrically and by the internal tracer method. The 69Ge tracer was produced on the same cyclotron in the Zn(α,xn)69Ge reactions. The isotope 69Ge as well as its contaminants 66Ga and 67Ga, produced in Zn(α,pxn)66,67Ga reactions, were separated from Zn by solvent extraction from 7M HCl. The resultant carrier-free 73As was of high radionuclide purity and did not contain detectable traces of the target material.
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    Metodyka otrzymywania, wydzielania i kontroli jakości izotopów promieniotwórczych wytwarzanych w cyklotronach w IFJ PAN
    (Institute of Nuclear Physics Polish Academy of Sciences, 2010) Bartyzel, Mirosław; Mietelski, Jerzy Wojciech; Misiak, Ryszard; Ochab, Ewa; Petelenz, Barbara; Szałkowski, Mirosław; Wąs, Bogdan; Zagrodzki, Paweł
    The presented report summarizes the long-term experience of a group of radiochemists from the Institute of Nuclear Physics, who have been involved in production, separation and quality control of radioactive nuclides arising in reactions of stable nuclei with charged particles accelerated in a cyclotron. The first part of the report says about possible applications of radionuclides, shows ways of target preparation, outlines methods of separation of radioactive products, gives the criteria for quality control, and describes briefly measurement methods. The second part contains monographs of the main radionuclides with which the group was dealing. An extra chapter is devoted to the assessment of internal doses delivered by the nuclides of interest, if administered to the patient’s organism.
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    Upgrade of the equipment for production of gallium isotopes from proton - activated zinc targets
    (Institute of Nuclear Physics Polish Academy of Sciences, 2014) Ochab, Ewa; Petelenz, Barbara; Szałkowski, Mirosław; Ruszel, Marek; Sroka, Artur; Bogdali, Paweł
    Two gallium isotopes, 66Ga (T1/2=9.4h, β+ 4.2MeV) and 67Ga (T1/2=78h, EC), can serve as good models in development of new 68Ga-labelled (T1/2=68m, β+ 1.9MeV) PET radiopharmaceuticals. In order to produce 66Ga and/or 67Ga from zinc targets activated in a medical cyclotron, we designed a prototype target whose external dimensions match the geometry of other standard targets, but which contains modified internal parts. Besides, we equipped our old apparatus for solvent extraction of 67Ga in new, remotely controlled, electric valves. Performance of the upgraded chemical apparatus turned out good and the gas- and water-tightness of the new target at room temperature were satisfactory too. Performance of the new target in the transport lines of the PETtrace cyclotron as well as its behavior in harsh thermal conditions have to be the matter of future experiments.