Question

1. Equations (2.4) and (2.5) are two defini- tions of the fluence. Consider the sphere illustrated to the right, with a uniform parallel beam of particles incident on its surface, so that AN, particles enter the sphere. Verify that the mean chord length is (L) 4R/3 and use this iden- tity to demonstrate the equivalence of the two definitions. U2 R [ΔΝ, Φlim (2.4) ΔΑ-0 ΔΑ J.o J. An alternative and arguably more useful definition of the fluence is in terms of the sum isi of path-length segments within the sphere, as illustrated in Fig. 2.2(b). The fluence can also be defined as ANE AA Σ,s (2.5) lim Δν-0| Δν AP0

Answer 1

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Thd cosoded4 C2xdcosp-tmndasdedg Here S whene Suace CLYLO chond mcan So) I(3 Suface CNCa

Sulast-k value 니x -P 3 X2R 니R choid .Mean 3