Cyclotron produced ⁴⁴gSc from natural calcium.
(44g)Sc was produced by 16MeV proton irradiation of unenriched calcium metal with radionuclidic purity greater than 95%. The thick target yield at saturation for (44g)Sc was 213 MBq/μA, dwarfing the yields of contaminants (43)Sc,(44 m)Sc, (47)Sc and (48)Sc for practical bombardment times of 1-2h. Scandium was isolated from the dissolved calcium target by filtration, and reconstituted in small volumes of dilute HCl. Reactions with the chelate 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA) indicated a reactivity of 54 ± 14 Gbq/μmol at end-of-bombardment.
Medical Physics Department, University of Wisconsin-Madison, Madison, WI 53706, United States. gwseverin@gmail.com
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Severin
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Engle
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Valdovinos
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Barnhart
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Nickles
D002118:Calcium / Q000737:chemistry*; D017357:Cyclotrons
D002118:Calcium