personal radiation detectors price

Since we can not see, smell or taste radiation, which depend on the instruments that indicate the presence of ionizing radiation. Radiation is energy that travels in the form of particles or waves in bundles of energy called photons. Some everyday examples are microwaves used to cook food, radio waves for radio and television, light and X-rays used in medicine.

Radioactivity is a natural and spontaneous process by which unstable atoms of an element or issue radiate excess energy in the form of particles or waves. These emissions are collectively called ionizing radiation. Depending on how the nucleus loses this excess energy either a lower energy atom in the same way will result, or a completely different nucleus and atom can form.

Ionization is a particular feature of the radiation produced when radioactive elements decay. These high-energy radiation so that they interact with materials that can remove electrons from atoms in the material. This effect is why ionizing radiation is hazardous to health, and provides means by which radiation can be detected.

How does a radiation detector work?

SCINTILLATION DETECTOR:

The basic principle behind this instrument is the use of a special material which glows or "flashes" when radiation interacts with it. The most material is a common type of salt called sodium iodide. The light produced by the scintillation process is reflected through a transparent window in which interacts with a device called a photomultiplier tube. The first part of the photomultiplier tube is another special material called a photocathode. The photocathode produces electrons when light strikes its surface. These electrons are then attracted to a series of plates called Dynoda through the application of a high positive voltage. When electrons from the photocathode hit the first dynode, several electrons are produced per initial electron hitting its surface. This "group" the electron is pulled towards the dynode next, where more electron "multiplication" occurs. The sequence continues until the last dynode is reached, where the pulse electrons is now millions of times larger then that was in the beginning of the tube. At this point, electrons are collected by an anode at the end of tube formation of an electronic pulse. The pulse is detected and displayed by the instrument.

Gas detector filled:

This instrument works on the principle that radiation passes through air or a specific gas, ionization of the molecules in the air cause. When a high voltage is placed between two areas of space filled gas, positive ions will be attracted to the negative side of the detector (the cathode) and the free electrons will move toward the positive (anode). These charges are collected by the anode and cathode which then form a small current in the wires going to the detector. By placing a very sensitive measuring device current between the wires of the anode and cathode, small current is measured and displayed as a signal. The largest amount of radiation entering the camera, the most current shown in the instrument. Many types of gas filled detectors exist, but the two most common are the ion chamber used for measurement of large amounts of radiation and the Geiger-Muller or GM detector used to measure very small amounts of radiation.