Making History One Voyage at a Time
Radioactive isotopes and construction # 003
The power facilities for gamma-translucent may be not necessarily high. For example, the experience of flaw detection of welded joints showed that low-power portable gamma settings can be applied. To translucent reinforced concrete design, the container is installed on it, and on the other hand, the design is placed. On the film shows the location and diameter of the reinforcement and the location of the cracks in the concrete. The use of portable gamma settings gives a significant economic effect. However, Currently, Gamma-shocking has a serious competitor - heat-winning, which gives very good "intrasion" results without danger of being irradiated penetrating rays. Passing through any material of the gamma rays are absorbed by them and the more, the thickness of the material and above its density. And how to find out how much gamma rays passed through the material? After all, a person does not feel penetrating rays and cannot quantify the radiation intensity. And the counters with the indicator come to the rescue - recorders of gamma rays. But you must even know the thickness of the material. This helps preliminary election on plates of known sizes made from the same kneading as the controlled product.
This method is much more efficient than any method of controlling geometric sizes. But in construction practice, it is often necessary to deal with the need to measure the thickness of concrete slabs or the roadbed, when access is possible to them only on the one hand. There is a device that will help it. The principle of operation of such a device is based on measuring the energy of gamma radiation, scattered in the opposite direction in the thickness of the material. The diagram of the device is easy. The narrow bundle of gamma rays from the source is directed at a certain angle on the stove or road coating. Reflected (scattered) rays catches meter, also located at a certain angle. The source of gamma rays and the radiation counter are placed in lead containers, between which the lead screen is put, protecting the meter from possible extraneous emissions. To increase the accuracy of measurements, pick up the angle of inclination, the intensity and energy of the source. The accuracy of measurement in this way is very high. The described principle is based on several variants of gamma denneters developed by the domestic industry. kiev.natashaescort.com/strapon
