alexa Evaluation of an internal cyclotron target for the production of 211At via the 209Bi (alpha,2n)211 at reaction.
Social & Political Sciences

Social & Political Sciences


Author(s): Larsen RH, Wieland BW, Zalutsky MR

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Abstract Astatine-211 is a 7.2 h half-life alpha-emitting radionuclide which has shown great promise for targeted radiotherapy. It is generally produced by cyclotron bombardment of bismuth metal targets with 28 MeV alpha-particles via the 209Bi(alpha,2n)211 At reaction. In order to provide 211At activity levels anticipated for clinical investigations, an internal target system has been designed and evaluated. The system has a grazing-angle configuration and leading- and trailing-edge monitors. Both aluminum and copper target backings were evaluated. With approx. 28 MeV alpha-particles, the 211At production efficiency was 41 +/- 7 MBq/microA.h, compared with 10.6 +/- 1.2 MBq/microA.h for an external target. Radionuclidic purity of 211At was high with no evidence of 210At.
This article was published in Appl Radiat Isot and referenced in Anthropology

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