科研之友
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摘要
In radiotherapy, the energy of the gamma rays used could be larger than 10 MeV, which would potentially activate stable nucleus into a radioactive one. The gamma induced reactions on some of the human essential elements are studied to show the probability of changes of nuclei. The Talys 1.4 toolkit was adopted as the theoretical model for calculation. The reactions investigated include the (gamma, n) and (gamma, p) channels for the stable Na, Mg, Cl, K, Ca, and Fe isotopes, with the incident energy of gamma ranging from 1 to 30 MeV. It was found that the cross sections for the reactions are very low, and the maximum cross section is no larger than 100 mb. By considering the threshold energy of the channel, the half-life time of the residue nucleus, and the percentage of the element accounting for the weight and its importance in the body, it is suggested to track the radioactive nuclei Na-22, Ca-41, and K-42,K-43 after gamma therapy. The results might be useful for medical diagnosis and disease treatment.
- 出版日期2015-6
- 单位河南师范大学
