Voltage when the machine is working. The higher the voltage, the greater the radiation energy and intensity. Intensity is inversely proportional to the square of distance. In addition, if it is not in the front, it will also be affected by scattered light. If there is no protective equipment behind the machine when working, it is about 20 meters.

According to GBZ 1 17-2006 "Radiation Health Protection Standard for Industrial X-ray Inspection", the specific kinetic energy rate of the air in the control area, that is, the operation area of the inspection operator, should be 15 microsieverts/hour; However, the specific kinetic energy rate of air within the safe distance of public personnel in the supervision area should be 1.5 microsieverts/hour; How many meters is a single imprecise; You can know the safe distance by measuring and comparing the monitoring instruments.

Extended data:

The simplest way to generate X-rays is to hit a metal target with accelerated electrons. During the impact, the electrons suddenly decelerate, and their lost kinetic energy (1%) will be released in the form of photons, forming a continuous part of the X-ray spectrum, which is called braking radiation. By increasing the accelerating voltage, the energy carried by electrons increases, which may knock out the internal electrons of metal atoms.

So the inner layer forms a hole, and the outer layer electrons jump back to the inner layer to fill the hole, and at the same time emit photons with a wavelength of about 0. 1 nm. Because the energy released by the outer electron transition is quantized, the wavelength of the released photons is also concentrated in some parts, forming a characteristic line in the X spectrum, which is called characteristic radiation.

The tough radiation of electrons bombards the metal with high-energy electrons, and the electrons decelerate sharply in the process of hitting the metal. According to electromagnetism, charged particles with acceleration will radiate electromagnetic waves. If the electron energy is large, such as tens of thousands of electron volts, X-rays can be generated. This is the method of generating X-rays used in laboratories, factories, hospitals and other places.

Electron transitions within atoms can also produce x-rays. According to the theory of quantum mechanics, electrons will emit photons when they jump from high energy level to low energy level. If the energy difference between energy levels is large, they can emit photons in the X-ray band.

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