Production cross-sections of medical radioisotopes from proton bombardment of Mo
نویسندگان
چکیده
This In 2009 a research program was started at the Cyclotron Institute to study the production of medical radioisotopes using beams of protons, alphas and helium-3 from the K500 superconducting cyclotron. Radioactive nuclides are mainly used in medicine for diagnostic (PET and SPECT imaging) and therapeutic (radiopharmaceuticals and brachytherapy) purposes. There have been 8 experiments performed as part of this program. The present work will focus on results of the analysis of the first experiment in the series. The motivation for it was two-fold. First, it was a study of the excitation function of Tc, commonly used in SPECT imaging, and of the potential for medical applications of the other residual radioisotopes. Second, it was a test on the effectiveness of the setup and the viability of the production mechanism as an alternative to nuclear reactors and generators. The analysis was based on the activation technique. A stack of Mo, Cu and Al foils was irradiated with a beam of protons with energy of 40 MeV/n. The gammas emitted from the activated foils were measured after a short cooling down period with a HPGe detector. A detailed description of the experimental set-up, procedure and the analysis steps can be found in a previous work [1]. The Cu and Al foils were used for energy degrading and beam normalization purposes. Figure 1 shows the beam energy after each foil as well as the order in the stack.
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