Based on data in TG-21 from Johansson et al. The remaining problem in the evaluation of eq. However, in general this correction depends on the specific depth-dose curve being measured and hence cannot be tabulated. Burns et al. Calculated values of for commonly used cylindrical ion-chambers.
Values apply for measurements at in a water phantom.
Calculated values of for plane-parallel chambers used in a water phantom at . Chambers are assumed waterproofed as described in table 3 . Unfortunately, these curves cannot be generalized as easily as in the case for photon beams. For the Markus and Capintec chambers, the effect of also plays a significant role, especially for the lower energies. For the cylindrical chambers, several factors are at work causing the differences seen in fig.