Sources of x-ray radiation

Sources of x-ray radiation it is possible to divide on two groups: natural and artificial. Natural sources of radiation. Some radioactive isotopes can serve as sources of X-rays. Intensity of X-rays of isotope sources is less than intensity of radiation of a X-ray tube. The sun is source of X-ray radiation also. Its X-ray radiation is so huge, that is capable to destroy in a few minutes all alive on the Earth. But the x-ray quantum on is many times absorbed and let out by particles of plasma to road to the Earth. As a result it comes on a surface of the Earth weakened. So rigid radiation of a sunlight becomes soft and turns to ultra-violet radiation, visible and infra-red.

There are "X -ray" stars though they are rare enough. 200 x-ray stars have been found out by 1977. Presumably the further searches will increase this number up to thousand. Presumably x-ray and optical (visible) radiation of x-ray stars represents a continuous spectrum of thermal radiation of gas, разогретого up to tens millions degrees.

Pulsars - the "beacons" invisible in a usual telescope. They change intensity of the radiation, radio wave or X-ray on a regular basis, quite often with surprising correctness through different time intervals. What is the pulsar? It is a neutron star which operates not alone, and together with the partner similar to our Sun, only it is many times more.

It super dense and rather massive, it incessantly draws on herself substance of the partner - the heated gaseous sphere. Thus the huge quantity of radiant energy is allocated in a x-ray range. The neutron star rotates about the axis, X-rays blink.

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