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Separation of arsenic from germanium oxide targets by dry distillation

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Abstract

Positron-emitting isotopes of arsenic, 70As (T 1/2 = 53 min), 71As (T 1/2 = 64 h), 72As (T 1/2 = 26 h), and 73As (T 1/2 = 17.8 d) are of interest in biomedical investigations using PET. A fast and simple method for their production using low-energy proton and deuteron reactions on enriched Ge-targets is presented. Dry distillation of GeO2 at 1105 °C during 2 hours provides a separation efficiency of more than 60%. The loss of target material is less than one per cent and the irradiated targets can be used several times. The method allows production of diagnostically useful amounts of positron-emitting arsenic isotopes using accelerators commonly available at PET-centres.

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Authors and Affiliations

  1. Sections of Biomedical Radiation Sciences, Department of Oncology, Radiology and Clinical Immunology, Rudbecklaboratoriet, Uppsala University, S-751 85, Uppsala, Sweden

    V. Tolmachev & H. Lundqvist

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  1. V. Tolmachev
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  2. H. Lundqvist
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Tolmachev, V., Lundqvist, H. Separation of arsenic from germanium oxide targets by dry distillation. Journal of Radioanalytical and Nuclear Chemistry 247, 61–66 (2001). https://doi.org/10.1023/A:1006706913108

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  • DOI: https://doi.org/10.1023/A:1006706913108

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