A comprehensive and accurate definition of the physical characteristics of a radiation field is a necessary, but not sufficient, condition for understanding (and predicting) the probability of observing a biological effect. Part of the difficulty of doing this stems from the fact that very often the biological final state accessible to observation is the end result of a long sequence of events following the irradiation, when most of the information has been distributed among many degrees of freedom. Demography is not a very good starting point for the study of photosynthesis, yet that is, in essence, what we are often forced to do.
KeywordsIonization Chamber Relative Biological Effectiveness Radiation Dosimetry Beam Delivery Argon Beam
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