Compare charged and uncharged particles leakage of plasma focus for medical radioisotopes production

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Abstract

In this study, to calculate the radioactivity of radioisotopes such as 11C, 15O, 18F and 123,124I in a focus plasma device for the production of medical radioisotopes, the particles of neutrons and protons with cubic targets of Nitrogen, Xenon, Carbon and a solid natural Boron is used. Particles energy are at the input of the program from 1MeV to 10MeV. Also, the total yield coefficient is considered. In this paper, with the help of MCNPX 2.7 code, the amount of flux and deposited energy of neutron and proton particles is calculated for the production of medical radioisotopes in the focal plasma system. According to the obtained results in this study, it is shown that due to the different absorption and resonance cross sections for the considered targets with the energy of the neutrons and the protons are not a linear increase in the flux of particles. But after an energy of approximately 10 MeV, this slope is almost constant due to the constant cross section. Also, the results of this study show that with increasing energy of protons in these targets, the deposited energy of protons increases linearly, but its maximum value for the nitrogen target and its lowest value for the Xenon target due to different interactions cross-section.
 

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