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ROuter vacuum (region 6)Air region (region 5)Al Cover (region 3)Gap (region 2)NaI (region 1)1.253MeVPhoton-5.6 -0.6 -0.5 0.0 15.24Quarz window(region 4)15.7420.74ZFigure 4: Geometry of ucnaicgv4.f{ Check ucnaicgv4.data by using CGView as followsSelect "Making geometry data" of File option.Select Open File and assign ucnaicgv4.data by changing le type to "all les".Geometry is displayed when you select OK.Select "Geometry Check" of Environment option.Select "Check Start". Run ucnaicgv4.f by egs5run.{ In the case of Linux or CygwinEnter ucnaicgv4 as the user code.Simply enter "return" as the le name for unit 4 and 25.Enter 1 for "Does this user code read from the terminal?".{ In the case of DOSegs5run ucnaicgv4 Compare the calculated results with nai.out.Example of the result: P e =53.1 0.5%, T e =94.3 0.2 %6.2 Problem 21. cp ucnaicgv.f ucnaicgv5.f2. cp ucnaicgv.data ucnaicgv5.data3. cp ucnaicgv.inp ucnaicgv5.inp4. Modify ucnaicgv5.f as follows: Modify the material data used.Change44