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Figure 3: Variation in the distal range (R90) corresponding to proton energy ranging from 70.2 to 226.2 MeV over the period of 8 months. All measurements were performed using Zebra multi-layer ionization chamber

Figure 3: Variation in the distal range (R<sub>90</sub>) corresponding to proton energy ranging from 70.2 to 226.2 MeV over the period of 8 months. All measurements were performed using Zebra multi-layer ionization chamber