Abstract
The living environment of human beings is being affected by various types of radiation. Among them, natural radiation has the largest dose. If the dose of natural radiation exceeds a certain threshold level, people will face health risks on multiple fronts. In this work, researchers measured the air-absorbed dose rate at 1 meter above different surface environments on campus and estimated the effective dose equivalent of environmental gamma radiation to the residents. Experiments and analyses show that the radiation level on campus was evaluated based on the measurements. The order of the amount of the radiation dose rate is granite pavement > cement pavement > asphalt ground. According to the experiments, the radiation content of external exposure in the campus is already slightly higher than the limit, i.e. 1mSv/y.
Highlights
The living environment of human beings has been exposed to various kinds of radiation
Natural radiation has the highest dose, which mainly includes cosmic rays and rays emitted by natural radioactive nuclides, such as 40K,232Th,238U
External sources are mainly cosmic rays and gamma radiation emitted by natural radioisotopes
Summary
The living environment of human beings has been exposed to various kinds of radiation. Natural radiation has the highest dose, which mainly includes cosmic rays and rays emitted by natural radioactive nuclides, such as 40K,232Th,238U. External sources are mainly cosmic rays and gamma radiation emitted by natural radioisotopes. Primary cosmic rays are mainly composed of positively charged high-energy particles (protons, α particles, etc.). When they enter the atmosphere, they react with the nuclei in the air to produce muons, neutrons, and gamma rays, which become secondary cosmic rays. The results showed that the concentration of naturally occurring gamma radiation activity and associated dose rates in Cyprus were significantly lower (five times on average) than the radioactivity levels reported in other parts of the world. GH-102A x-γ dose rate meter method is used to measure the absorbed dose rate of the air in the case of the campus radiation, and the overall radiation level of the campus was evaluated
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