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Function of security X-ray machine

Four Functions of Security X-ray Machine

1. Penetration

Penetration is the ability of X-rays to pass through matter without being absorbed. X-rays can penetrate substances that normally cannot be penetrated by visible light. Visible light has a long wavelength and some of its energy is very small. When it strikes an object, part of it is reflected, and most of it is absorbed by matter and cannot pass through the object. Otherwise, X-ray has a short wavelength and a large energy. When it shines on the material, only part of it is absorbed by the matter, most of it is transmitted through the atomic gap. It shows strong penetration ability. The ability of X-ray to penetrate matter is related to the energy of X-ray photons. The shorter the wavelength of X-ray, the greater the energy of photons and the stronger the penetration force. X-ray penetration force is also related to the density of matter. Dense matter absorbs more X-ray and transmits less. Dense matter absorbs less and transmits more. The use of different absorption properties can distinguish soft arrangements such as skeleton, muscle and fat with different densities. This is the physical foundation of X-ray fluoroscopy and photography.

II: Thermal action

Most of the X-ray energy absorbed by matter is converted into heat energy, which increases the temperature of the object. This is called thermal action.

3. Photosensitivity

Like visible light, X-ray can sensitize film. When X-ray irradiates silver bromide on the film, silver particles can be deposited and the film has a “photosensitive effect”. The sensitivity of the film is proportional to the amount of X-ray. When X-ray passes through the human body, the density of each arrangement of the human body is different, the absorption of X-ray quantity is different, the sensitivities obtained on the blown film are different, and then the impression of X-ray is obtained. This is the basis of X-ray photography.

IV: Colouring

Some substances, such as barium platinum cyanide, lead glass, crystal, etc., are dehydrated to change color after long time irradiation by X-ray, which is called colouring effect.