Cross section measurements using gas and solid targets for production of the positron-emitting radionuclide O-14

Z. Kovács, B. Scholten, F. Tárkányi, H.H. Coenen and S.M. Qaim

Abstract

Irradiation of nitrogen with protons leads to 11C (T1/2=20.4min) via the well-known 14N(p,α) reaction. However, 14O (T1/2=70.6s) and 13N (T1/2=10min) are also formed as side products via the 14N(p,n) and 14N(p,d+pn) reactions, respectively. In this work detailed cross section measurements were carried out for those two side reactions up to 19.2MeV using N2 gas and nitrogen-containing solid targets. From the data, the thick-target yields and the exact level of radioactive impurities in 11C were calculated. In the case of 14O, the results also confirmed the possibility of producing this β+ emitting radionuclide in sufficient quantities for PET investigations.

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Radiochimica Acta publishes original papers, review articles, and “rapid communications” (short articles of a more timely interest) on all chemical aspects of nuclear science and technology. The journal is geared toward scientists who are actively engaged in research work.

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