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Table 4: Req for rectangle field sizes, E=12 MeV and σ2 =1.03 (radian2 cm2) 2a and 2b (cm) are the sides of rectangle

Table 4: R<sub>eq</sub> for rectangle field sizes, E=12 MeV and</b> σ<sup>2</sup> =1.03 (radian<sup>2</sup> cm<sup>2</sup>) 2a and 2b (cm) are the sides of rectangle