English Abstract The methods to determine the absorbed dose to water for
low and mediunm energy photons were studied. Large differences between the
results of these methods exists. So, a research proposition has been made
to explain these differences. The goal of the research will be the
development of a method to determine the absorbed dose below approximately
400 keV with an ionisation chamber calibrated an 60 Co gamma radiation. To
explain the differences between the set of methods, some methods, some
causes were proposed, like the influence of the ionisation chamber on the
measurement in water. Also, some methods to determine the factors are
proposed.
