For testing of an electronic in high radiation region where gamma rays will be there, is any possibility that the similar effect can be obtain by hard X ray?
X-ray vs Gamma ray
Although the interactions of gamma ray and x-ray with matter are similar but x-ray is a polyenergetic radiation (photons have a range of energy limited by filtration and kVp). If in your experiments, this difference can be ignored, you surely can perform your experiments with x-rays.
There is no difference between soft Gamma and hard X-rays. There is no defined energy that is used as a boundary between them. It is a continuous spectrum. Gamma rays are at the highest end of the electromagnetic spectrum, so they can range quite a bit in energy.
The answer to your question depends on what is the source of the Gamma radiation which the device will be exposed to. Are you talking about cosmic Gamma sources or Gamma radiation from radioactive decay? If it is from radioactive decay then a hard x-ray source would be a good comparison, as the interactions would be the same, only the amount of energy deposited would be different which you would know and be able to correct for. A synchrotron can produced light in this energy range, and is often used to study radiation damage of materials.
I'm not sure what Ali is talking about. Gamma rays are poly-energetic as well and are photons.
Although different radionuclides emit gamma rays with different energies, gamma rays are not polyenergetic (polychromatic) because a specific radionuclide always emit monoenergetic photons (e.g. 140 keV photons from Tc-99m) while x-rays produced by x-ray machines are polychromatic and have a large spectrum.
Ali,
This is not the only source of gamma radiation. You could say the same thing about characteristic x-rays. Different anode materials give off different x-rays depending on the element. However for both there are many sources. At a synchrotron you get a full spectrum of light from visible to gamma. Cosmic gamma ray source can emit in a large continuous energy range. So Gamma rays are just as polychromatic as x-rays, UV, IR, visible, etc... There is no difference. They are all photons, and although there are specific interactions that produce characteristic energies for the entire electromagnetic radiation spectrum (for example, only a discrete visible light energies are produced by fluorescence (and the same can be said for UV,X-rays, etc...). You are making an incorrect generalization based on few specific methods for production of x-rays and gamma rays.
what do you want to simulate? The cross section for various interactions as a function of energy? That can be done. Here is a good link for a number of programs and databases.
http://henke.lbl.gov/optical_constants/web.html
I suggest FLUKA or BEAM NRC. If you need a simple and short calculation - let me know.
www.nndc.bnl.gov
http://www.kayelaby.npl.co.uk/atomic_and_nuclear_physics/4_6/4_6_1.html
may also be useful for you. It is question of choice gamma or X ray to use. Just take care that several gamma source may produce X ray together with. This is not true for certain equipment but for source yes.