D. Brinkevich, S. Brinkevich, H. Kiyavitskaya, A. Kiyko
{"title":"SOURCES OF GAMMA-EMITTING RADIONUCLIDES IN THE PRODUCTION OF RADIOPHARMACEUTICALS USING ТНЕ CYCLONE 18/9 HC CYCLOTRON","authors":"D. Brinkevich, S. Brinkevich, H. Kiyavitskaya, A. Kiyko","doi":"10.46646/sakh-2021-2-245-248","DOIUrl":null,"url":null,"abstract":"The accumulation of secondary radionuclides (PRN) in water [18O]H2O under irradiation on a Cyclone 18/9 HC cyclotron with a niobium target and an entrance window made of Havar alloy was studied. It is shown that the activity of PRN is mainly determined by the accumulated dose of the target. The dominant source of PRN is the entrance window made of Havar alloy. The niobium target is the source of only one radionuclide, 92mNb, whose activity is low. In the process of water activation, radioisotopes 7Be and probably 65Zn are formed. The water [18O] H2O irradiated on the cyclotron is a dispersed system. Up to 30 % of the activity of cobalt and manganese, as well as ~7% of chromium, are in the composition of solid particles >5 microns in size, washed out of the input foil of the cyclotron target due to intergranular corrosion.","PeriodicalId":385455,"journal":{"name":"SAKHAROV READINGS 2021: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY Part 2","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2021-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"SAKHAROV READINGS 2021: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY Part 2","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.46646/sakh-2021-2-245-248","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
The accumulation of secondary radionuclides (PRN) in water [18O]H2O under irradiation on a Cyclone 18/9 HC cyclotron with a niobium target and an entrance window made of Havar alloy was studied. It is shown that the activity of PRN is mainly determined by the accumulated dose of the target. The dominant source of PRN is the entrance window made of Havar alloy. The niobium target is the source of only one radionuclide, 92mNb, whose activity is low. In the process of water activation, radioisotopes 7Be and probably 65Zn are formed. The water [18O] H2O irradiated on the cyclotron is a dispersed system. Up to 30 % of the activity of cobalt and manganese, as well as ~7% of chromium, are in the composition of solid particles >5 microns in size, washed out of the input foil of the cyclotron target due to intergranular corrosion.
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