Eesti keel   Русский   English



Medical Device Sterilization

Bioburden reduction of consumer goods:

  • cosmetics
  • spices
  • herbs
  • toiletries
  • pharmaceutical raw materials
  • food packaging
  • dyes and colorants

Industrial products processing



Background radiation measured on the exterior wall of Scandinavian Clinics Estonia OÜ´s plant (μSv/h):

(Natural background radiation in Estonia may reach up to 0,3 μSv/h)



Survey area: 0,12 µSv/h;
Control area: 0,10 µSv/h;
Pool: 0,08 µSv/h


Gamma is an electromagnetic wave emanating from radioactive material. In industrial practice Cobalt-60 is the only practical alternative. The electromagnetic wave from Cobolt-60 has a very good penetration (meters). It interacts with matter in a complicated way and after a series of chemical reactions the end result is slow electrons.

In beta, or E-beam, the electrons emitted in the electron gun at the back of the accelerator will be accelerated in order to get fast electrons which are the only electrons capable of penetrating matter deep enough. The acceleration is initiated and maintained by microwaves (like in radar) and the electrons are riding on these microwaves. At the end of the acceleration the fast electrons continue by themselves through a window and create a curtain of electrons through which the goods are transported. The fast electrons interact with the matter and the end results, as in gamma, are slow electrons.

The slow electrons create free radicals. So, in terms of function, gamma and beta are the same. Therefore a sterilization dose of 25 kGy is the same independent of which source of radiation you have - beta or gamma. These concepts are the common wisdom today and are the basis for regulations and standards.