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Variation of depth-dose with angle

Depth-dose data were obtained for a 6 MeV electron beam on an Elekta SL15 linear accelerator at a long source distance using a parallel-plate ionisation chamber.

Depth-dose as a function of angle were computed and compared with a diode detector.


  
Figure: Dose versus depth for obliquely incident broad parallel 6 MeV electron beams 0 through 80$^{\circ }$
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