We live in the radiation environment micro- radiation does not endanger the health

We live in the radiation environment micro- radiation does not endanger the health
We live in the radiation environment micro- radiation does not endanger the health
Radiation, Center for Disease Prevention and Control of China, protect with the intersection of nuclear safety and the intersection of medical science and yesterday such as Xu such as Su such as chief act as a guest www.people.com.cn's interview, warn everybody no " Strike torror at the topic of spoke " ,Because we live in an environment with radiation. It is not any micro- radiation that is harmful to health. "I remember U.S.A. have one scientist make one test ever, build one environment that have not radiation at all, he places a lower animal on the space that a piece of lead totally shields, other conditions are all the same, such as air, humidity, intensity of illumination,etc., but can not grow well. So the environment of this bottom that people have met a natural radiation in the course of evolving and meeting. " Su Xu says. Su Xu introduces, there is natural radioactive nuclide in the nature. Natural radiation comes from several respects: First, the radioactive nuclide in nature in the soil. In addition it is a cosmic ray. And some is artificial radiation, for example utilize nuclear energy and some increasing in the course of the nuclear technology to add and shine. Radiation is divided into two big classes, first, radioactive material, second, the ray device, the ray device mainly points X-ray machine, CT machine,etc., could produce the device of the ray only under energizing the situation. Usually said radioactive material is formed by radiosiotope, when the radioactive nuclide decays, can emit the ray. There are three kinds of rays emitted: �� ray, �� ray and �� ray. ��'s ray range is short, ionization is very capable, the same energy loses all energy ralease on very short range. �� ray is penetrated very capably, but ionization ability is very weak, could transmit all energy out on very long route, deposit. �� ray lies between the two. To different nuclide, the ray emitted is different, some only emit �� ray, full of emitting �� and �� ray, we take differently and protect the method according to the properties of different nuclide. As to the radioactive nuclide of ��, the range radiated in the air is very short, can be blocked with a piece of paper, we should prevent it from entering the body, once enter body, produce ionization to the tissue of the organism, the local damage is very great. As to the shelter of the ray that ray device and radioactive material produce, it is mainly the shelter of shining outside. The shelter of shining outside is mainly three kinds of means, six words, namely time, distance, shielding. Time: Try hard, reduce the intersection of ray and contact time, contact time short, receive radiation to be little; Distance: The ray intensity is with inversely proportional to squaring, the farther the distance is, the weaker the intensity is. If it is the time of 1 the ray intensity is 1, if of 2 meters has been reduced by 4 times, if 4 meters are reduced by 16 times, before reducing a lot a bit far. Shield: Use or utilize shielding materials or shield things as much as possible. (reporter Liu JingTing)


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